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Kudos0

CPU Usage about 30%

Good afternoon. I do not know why my CPU usage during the period of inactiveness reaches 30%? can't say that my i7 6700-HQ is that bad? what should I do? have read all the CPU issues on forums. checked settings-adm. status "finished" for everything except explorer. 

Replies

Kudos0

Re: CPU Usage about 30%

Lots of programs and Windows, itself, run background tasks when your PC is idle.  You can always pull up Windows Task Manager to see what processes are using the CPU when this happens.

Kudos0

Re: CPU Usage about 30%

Also, if you have Chrome installed Software Reporter Tool will scan your machine at times while it is idle too.

A little bit of knowledge is... well a little bit of knowledge.
Kudos0

Re: CPU Usage about 30%

Actually, no. I opened Task Manager and saw 30% of usage by Norton Security (nortonsecurity.exe) . That is why I decided to write here=)

Don't get me wrong, I'm not interested in using Norton 24/7 with "no messages regime" (English is not my language).

BTW, I'm kinda minimalist in the way of installed programs and other stuff.

I am attaching some graphs with that reply. It's not English, but intuitively it is simple to tumble to, I guess.

File Attachment: 
Kudos0

Re: CPU Usage about 30%

I've been having this exact same issue for several weeks now. After four minutes of idle time regardless of whatever else is running, Norton fires up, the fans ramp up and it sits at 30% CPU until I move the mouse.

I was about to start a new thread but several already exist and I've tried everything I can find including reinstalling. I've disabled every background task and nothing is in a cancelled state.

I've been using Norton for years and never had any real problems but this one has me stumped. If anyone has any suggestions, I'm keen to try anything.

Cheers. Mick.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Hi mickhardy:

Your Background Tasks show that an Insight Optimizer (disk defrag) ran recently even though your setting at Settings | Administrative Settings | Idle Time Optimizer is disabled.  Any disk defrag that has already started must run to completion before the setting change takes effect, so this might not be a concern if you recently disabled this setting.

Also, did you disable all the scheduled tasks at Settings | Tasks Scheduling | Automatic Tasks?  Just to add to the confusion, there are actually two different settings that control disk defrags in Norton v22.x:

  • Settings | Administrative Settings | Idle Time Optimizer (a background idletime defrag)
  • Settings | Task Scheduling | Automatic Tasks | Disk Optimization (a scheduled defrag)

If you monitor your background tasks (Settings | Administrative Settings | Background Tasks | Configure) and find that Norton Community Watch (NCW) is running for long periods of time during system idles, this is another background task at Settings | Administrative Settings | Norton Community Watch that can be reconfigured (e.g., by setting Detailed Data Error Collection to Never) or completely disabled.  These NCW submissions help Norton to fine tune the accuracy of their detections but you can safely disable NCW without harming your real-time protection if they are running too frequently.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15 * MB v3.3.1

Kudos0

Re: CPU Usage about 30%

Looking at the background tasks Run in Idle time, LiveUpdate ran which will trigger a Quick scan. Insight scan also ran for 7 minutes.

These kinds of things are normal. As long as they give back control when you move the mouse or use the keyboard, things are working as they should.

Also, if some other Windows tasks are running while idle, Norton Autoprotect will be running to scan any files being accessed by those tasks.

Things happen. Export/Backup your Identity Safe data.
Kudos0

Re: CPU Usage about 30%

Thanks for the suggestions Imacri but they were all disabled as per your screenshot. I did have that screenshot same as yours but missed posting it. I ran the disk defrag manually and it completed in a few hours. I ran most of the background tasks manually prior to the screenshots and then waited a few days before posting but it didn't change anything.

Norton Community Watch only takes a minute so I left it enabled. I've disabled that just now and see no change.

If I reboot and walk away with nothing running other than task manager, Norton ramps up in under five minutes with this 30% CPU usage. It runs like that all night every night for weeks now. I've been using Norton for years peterweb. This is not normal behaviour.

Apart from updates for existing software, the only recent applications installed in that time frame are CyberPower PowerPanel for a new UPS and DisplayFusion for a new monitor.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

mickhardy:
...If I reboot and walk away with nothing running other than task manager, Norton ramps up in under five minutes with this 30% CPU usage. It runs like that all night every night for weeks now....

Hi mickhardy:

Users rn333617 and dsiebold have posted similar comments about unusual and excessive CPU activity by nortonsecurity.exe during system idles in the 28-Mar-2018 thread nortonsecurity.exe running at high cpu for long time.

It's possible there was a glitch during the recent product update to v22.12.1.15 that corrupted your installation (see my comments in rn333617's thread about the Norton Remove and Reinstall tool) but there are a few other troubleshooting tips in that thread that might help you determine if there could be a more serious problem like a bug in v22.12.1.15 or a conflict with a recent Windows OS update.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15 * MB v3.3.1

Kudos0

Re: CPU Usage about 30%

I had the exact same issue as mickhardy. Popped up recently. Reinstalling with the remove-reinstall tool didn't help. What did though, was returning to one of my Windows backups and installing NS on that.
Kudos0

Re: CPU Usage about 30%

rindert:
I had the exact same issue as mickhardy. Popped up recently. Reinstalling with the remove-reinstall tool didn't help. What did though, was returning to one of my Windows backups and installing NS on that.

Hi rindert:

Thanks for the feedback about the NRnR tool.

Could you let us know your Windows OS [include the version/build if Win 10 (e.g. Version 1709 build 16299.334)] and your Norton product name and version number (go to Help | General Information | About).

If you have a Win 8.x or Win 10 OS is the Fast Startup power option described in peterweb's thread Windows 8/8.1 or 10 and Fast Start Feature normally enabled (the default) or disabled on your system?
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15 * MB v3.3.1

Kudos0

Re: CPU Usage about 30%

OS Build is as in your e.g. NS version as in your signature except I have no Premium. Fast startup enabled. Edit: I just remembered the tool didn't complete correctly but after uninstalling and downloading ended with an error message.
Kudos0

Re: CPU Usage about 30%

I've woken up to an eerily quiet computer. It appears to have finally finished whatever it was doing and is back to normal. Live update and quick scan are the only two background tasks that ran last night. I didn't change anything. I was asleep.

Thanks for all your help and suggestions in this and other threads.

Edit: Well, that was short lived. Back up to 30% after my morning run.

Edit 2: I've added my specs to my signature. Fast startup was disabled prior to the reinstall about four days ago. I've been through the post Imacri linked and tried everything I could find on these forums prior to posting. I'm not one to post on forums before battling it alone well beyond the point of despair.

Edit 3: I've just noticed NCW ran this morning despite being disabled. This would have been about the time I went for a run. Not sure if this sheds any light on anything for anyone.

Edit 4: It looks like I need a new post to show my signature so I'll add it here to avoid double posting.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.12.1.15

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Hi all, I am facing the same issues as many other users with the most recent Norton Security build. Bluntly to say, it was frying my CPU running at 60% at idle times, and my CPU temperature reading was as high as 96 deg C. Some extra details: (1) My OS is Windows 8.1 Pro and the fast startup option is disabled for years. (2) I used Norton Remove and Reinstall module with the Norton Security and the problem remained. (3) Just like Vlad1ki3, all the automatic /scheduled settings are disabled: (a) Disc Optimizer, (b) full system scan, (c) performance monitoring, (d) norton community watch, (e) idle time optimizer. (4) I even had Norton Security in the Silent Mode for several hours, and when I returned the CPU was running hot. This was a deliberate test where no browsers was opened. See Task Manager image in attached PDF. (5) And yes I checked background tasks and no prior actions were taken hours by Norton Security. See attached second image. Yet Norton Security was burning through the CPU with the fan blowing at full speed. Note all background tasks required less than 5 min to run, but the CPU was burning hot for tens of minutes if not hours! (6) I have been using Symantec Endpoint Protection for five years with my employer and got my own Norton Security three years ago. Not once I recall to have encounter this problem. At this point, I am prepared to forsake my remaining two-and-half year subscription and jump ship to save the hardware ...
File Attachment: 
Kudos0

Re: CPU Usage about 30%

mickhardy:
...Edit 3: I've just noticed NCW ran this morning despite being disabled. This would have been about the time I went for a run. Not sure if this sheds any light on anything for anyone....

Hi mickhardy: 

I don't know why but NCW always reports that it runs each day for a 1 sec duration in the Norton Tasks window on my system and I always have this task disabled, so I wouldn't worry about that.  Here's an old screenshot from Sept 2017 when I was using NS Premium v22.10.1:

Have you tried a refresh of your installation yet with the Norton Remove and Reinstall (NRnR) tool as instructed at https://www.norton.com/nrnr?  If that didn't help post back and let me know what NS product you use (Basic, Standard, Deluxe or Premium) and I can provide instructions for a clean re-install that will perform a deeper wipe of NS, which is sometimes required for stubborn problems.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15 * MB v3.3.1

Kudos0

Re: CPU Usage about 30%

Would it be possible for one of the Gurus monitoring this thread to have this problem escalated to a Norton employee?  At this point it might be worthwhile to have someone from Norton providing input and/or collecting diagnostic logs for the support techs to see if they can find a root cause.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15 * MB v3.3.1

Kudos1 Stats

Re: CPU Usage about 30%

Would it be possible for one of the Gurus monitoring this thread to haveThe  this problem escalated to a Norton employee?

OK. Done.

The NCW running may just be the feature gathering information in case the user wishes to join the program at a later date. It just does not get transmitted to Norton. Actually in this case, if it were enabled, it might be sending back telemetry on how the users system is behaving with this elevated CPU usage.

Things happen. Export/Backup your Identity Safe data.
Kudos0

Re: CPU Usage about 30%

Installed two Norton updates this morning. Didn't solve my problem. I guess there is no point to add prt sc with Norton 30% usage and all the rest of programs lower that 1% at the time of idle. My vent is running crazy and, as ithacacian said, it is much cheaper for me to change my subscription to Norton than repair possible damage. I understand that most of the Airlines companies respond to the clients in Twitter at the exact same day because of the urgency. The problem, that we collectively sharing, is not that urgent, but still if someone's addressing a letter - he's hoping for an answer, doesn't matter good or bad for him. An answer. We didn't write on reddit or somewhere else. We decided that it will be much more faster to Norton staff members to respond on their own web-site. 

If you will call the police and will say that you have a fever - they will gently ask you to call an ambulance and wish you good fortune. That is respond. It will not cure or smth, but at least you will know that there is no point in waiting for someone from police to come and help. Point is: I wrote that I have a problem. I am waiting for an answer. I would be much more happier if I saw a respond with something like "we didn't know for sure what causes that usage, can you give us some extra details", or "can you contact our costumer service specialist via e-mail or ...(something useful)". I am sure that there are plenty of users with that type of issue that didn't want to write about it or didn't notice that issue yet. 

Sorry if my message is offensive. 

IDK if that will help someone to resolve my issue, but I have 

Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz

4 GB NVIDIA GeForce GTX 950M

x64 Windows 10

latest updates installed via HP Support Assistant and Intel Driver and Support Assistant.

I wish you all good fortune and have a nice day.

Kudos0

Re: CPU Usage about 30%

Vlad1ki3:

....I would be much more happier if I saw a respond with something like "we didn't know for sure what causes that usage, can you give us some extra details", or "can you contact our costumer service specialist via e-mail or ...(something useful)". I am sure that there are plenty of users with that type of issue that didn't want to write about it or didn't notice that issue yet. 

Sorry if my message is offensive...

Hi Vlad1ki3:

No offense taken.  Many of us are frustrated about the lack of feedback from Norton employees in this user forum (see my 2014 thread Better Tech Support by Symantec Employees Needed in the Forum) but no one at head office seems to be listening.

If you prefer to contact Norton Customer Support directly the links are posted on the right side of every page in this forum as shown in the image below. Live Chat is available at https://www.norton.com/chat.

---------------
32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15 * MB v3.3.1

Kudos1 Stats

Re: CPU Usage about 30%

I've been having the same problem as others for about a week now and mickhardy's task manager picture is similar to what happens in mine.  Whenever norton spikes up my CPU (usually to around 13%, I have a gaming CPU so the spike doesn't use as much of my CPU) I notice that .NET optimizer process and the MS Common Language processes come up.  They both disappear the moment I move my mouse and norton stops spiking after a few more seconds.

As far as I can tell this is Norton causing this issue as I've turned it off completely a few times (after interrupting whatever this is) and let my PC go idle and nothing happens.  Those 2 Windows processes that I listed above don't appear when Norton's off either.  I went into task scheduler (in windows not just Norton) and made sure that .NET optimizer was set to off for idle times, and it was.  All of the settings recommended in here for Norton itself I also already had turned off long before this started happening.  It happens at least once per day and sometimes twice (in the morning and later at night) and it will keep happening every time I go idle for 4-5 minutes until I let it finish whatever it's doing, which takes about 10 minutes on my PC.

Kudos0

Re: CPU Usage about 30%

it will keep happening every time I go idle for 4-5 minutes until I let it finish whatever it's doing, which takes about 10 minutes on my PC.

This is slightly different to the 30% issue which never completes. I've seen the 15% behaviour you describe as well with this version but it only ramps up for a relatively short period. I think it depends on which crypto-currency they're mining on the day.

Today's behaviour for me is the 30% version after exactly four minutes of idle time. It takes seven seconds to reach the 30% peak.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

I used the NRnR tool to refresh my installation as per Imacri's suggestion. Some of my settings were retained but many were reset. My previous reinstall was stock standard keeping all settings. I have Norton Security Premium for five devices and this installed version 22.12.0.104. I ran all background tasks including LiveUpdate but the version hasn't changed. Have they pulled V22.12.1.15?

After four minutes idol, Norton decided to run the 15% version described by Thel85. It ran for an hour before winding down without intervention. My monitors were off but I heard the fans wind down so I checked and sure enough it had completed and was no longer using 15% CPU.

Edit: I ran LiveUpdate from the main interface rather than from the background tasks and it installed V22.14.0.54. After rebooting and waiting for seven minutes of idol, it started the 15% CPU version again. Not sure if this is progress or not. After four minutes I thought briefly that everything was fixed but it's still broken.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Apologies for hijacking your thread Vlad1ki3 but the more noise the better I reckon.

I'm back on the 30% version of this and my notebook is doing exactly the same thing but at 45%. Both are running V22.14.0.54. I'm rapidly running out of patience and struggling to find a solution.

Windows 10 1709 (Build 16299.334) Dell XPS 13" i7-6560u @2.2hz 8GB

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Same problem here.  Every time computer goes into idle, fan goes on due to Norton spiking 25-30%.  Been using Norton for years and this never happened. Started about a week ago.  Tried contacting Norton 3 separate times and got no help.  Last time was yesterday afternoon and they took my number and said they would get back to me.  A day later and have not heard a word.  Quite frustrating. 

Accepted Solution
Kudos3 Stats

Re: CPU Usage about 30%

Open Task Scheduler, navigate to Task Scheduler Library | Microsoft | Windows | .Net Framework and disable all tasks starting with .Net Framework NGEN

Visual studio configures these tasks and they're currently conflicting with Norton Security.

Nothing to do with Norton background tasks, it's Norton Auto-protect fighting with the Native Image Generator, which is supposed to improve the performance of .Net applications. It's this task that kicks off when the computer is idle, not Norton. I have a lot of development folders excluded from Sonar but disabling Sonar didn't help this situation.

For the Norton developers: I installed Windows 10 and Norton Security in a virtual machine and it behaved normally so I knew it was an issue with my two computers. Immediately after installing Visual Studio 2013, the virtual machine behaves in a similar fashion so this is easy to reproduce. There is nothing else on this machine, just Windows 10 express settings with all updates, Norton Security V22.14.0.54 and Visual Studio 2013 with no optional components. Leave it for four minutes or run the tasks manually and away we go.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

"Leave it for four minutes or run the tasks manually and away we go."

4 minutes is the idle time required under W 10 for Automatic Maintenance to run.

Make your life easier by adding to regedit/Admin mode the following key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\Maintenance

MaintenanceDisabled DWORD=1

Reboot pc. Now Auto Maintenance never runs and you are happy and Norton too.

If you need sometimes to re-enable Auto Maintenance switch the reg key to DWORD=0 and reboot again.

Enjoy!
 

Kudos0

Re: CPU Usage about 30%

mickhardy:

Open Task Scheduler, navigate to Task Scheduler Library | Microsoft | Windows | .Net Framework and disable all tasks starting with .Net Framework NGEN....Visual studio configures these tasks and they're currently conflicting with Norton Security.

Nothing to do with Norton background tasks, it's Norton Auto-protect fighting with the Native Image Generator, which is supposed to improve the performance of .Net applications....

Hi mickhardy:

Thanks for the update, and good work isolating the cause of the high idle-time CPU by nortonsecurity.exe on your system.  Kudos as well to Thel85 for the comment <here> about the .NET Optimizer.

I don't have Visual Studio or any tasks at Microsoft | Windows | .NET Framework in my own Task Scheduler so I can't follow up on my own machine.  Do you know if these scheduled tasks launch the Native Image Generator tool (Ngen.exe) or some other NGEN executable mentioned in the Tom's Hardware thread Is it safe to disable ngentask.exe ?

If so, go to Security | Scans | Norton Insight | Go.  Choose Untrusted Files (or possibly some other subset like All Loaded Modules) from the Show dropdown list and see if you can find Norton's current trust rating for your NGEN files.  It's possible that a recent Windows Update updated some NGEN files that haven't been whitlisted (trusted) yet by Symantec, causing Norton's Auto-Protect to wake up and monitor these processes during system idles.  If that's the case it might be possible to make a False Positive submission at https://submit.symantec.com/false_positive/ and have the file(s) tested and whitelisted so this high idletime CPU consumption by nortonsecurity.exe is corrected for all Visual Studio users.

Also, did you ever try to use the Norton Performance Graph as instructed in n333617's thread nortonsecurity.exe running at high cpu for long time to see if you could catch the name of the non-Norton process causing the high CPU?  I'm just curious to know if these NGEN files were ever detected by the Performance Graph during system idles, since your image <here> showed that the NET Framework Optimization Service was only consuming about 0.2% of your CPU when your Norton Auto-Protect went into overdrive.  That troubleshooting tip wouldn't help if that 0.2% CPU consumption is below the detection threshold for the Performance Graph.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.14.0.54 * MB v3.3.1

Kudos0

Re: CPU Usage about 30%

@LMacri,

Under W 10, NGEN tasks run when Auto Maintanance is triggered, if there is no new Windows Cumulative update installed, those 4 tasks usually finish after a couple of minutes, however if there is a new Windows update all scheduled tasks are long to finish sometimes 20 mins sometimes 30 sometimes maybe one hour,depending also on pc's hw specs, and CPU and HDD suffer. Disabling Auto Maintenance solves that problem. If a user wants to re-enable it, personally I don't, it's very simple via regedit as I mentionned in my previous post.

Kudos0

Re: CPU Usage about 30%

Apostolos:

Under W 10, NGEN tasks run when Auto Maintanance is triggered, if there is no new Windows Cumulative update installed, those 4 tasks usually finish after a couple of minutes, however if there is a new Windows update all scheduled tasks are long to finish sometimes 20 mins sometimes 30 sometimes maybe one hour,depending also on pc's hw specs, and CPU and HDD suffer. Disabling Auto Maintenance solves that problem. If a user wants to re-enable it, personally I don't, it's very simple via regedit as I mentionned in my previous post.

Hi Apostolos:

I'm not doubting that your Win 10 registry tweak would be a viable alternative to mickhardy's workaround <here> to disable the Native Image Generator (NGEN) tasks in the Task Scheduler, but if nortonsecurity.exe (Norton AutoProtect) is responsible for the high CPU consumption during system idles because of out-of-date file trust ratings or some sort of conflict with a legitimate Windows software program like Visual Studio then I would prefer to see Symantec fix the issue from their end so that all affected users are helped.
---------------
32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.14.0.54 * MB v3.3.1

Kudos0

Re: CPU Usage about 30%

lmacri:
Apostolos:

Under W 10, NGEN tasks run when Auto Maintanance is triggered, if there is no new Windows Cumulative update installed, those 4 tasks usually finish after a couple of minutes, however if there is a new Windows update all scheduled tasks are long to finish sometimes 20 mins sometimes 30 sometimes maybe one hour,depending also on pc's hw specs, and CPU and HDD suffer. Disabling Auto Maintenance solves that problem. If a user wants to re-enable it, personally I don't, it's very simple via regedit as I mentionned in my previous post.

Hi Apostolos:

I'm not doubting that your Win 10 registry tweak would be a viable alternative to mickhardy's workaround <here> to disable the Native Image Generator (NGEN) tasks in the Task Scheduler, but if nortonsecurity.exe (Norton AutoProtect) is responsible for the high CPU consumption during system idles because of out-of-date file trust ratings or some sort of conflict with a legitimate Windows software program like Visual Studio then I would prefer to see Symantec fix the issue from their end so that all affected users are helped.
---------------
32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.14.0.54 * MB v3.3.1

NGEN tasks are not strictly related to Visual Studio, every W 10 system have those tasks in Task Scheduler and it's Microsoft who have programmed those tasks. I have not Visual Studio, however those tasks are on all my W 10 x64 systems and related to Auto Maintenance which is supposed, unfortunately, to run every 24 hours. As for Symantec, I do not think it's a high priority issue for them, I do not even know if it's possible to fix. If Norton "sees" a new Windows activity like a bunch of scheduled tasks it is supposed to monitor and check,and I do not think that it has to do with out-of-date file trust ratings or some sort of conflict, therefore my suggestion to disable Maintenance, many of those tasks are for telemetry purposes.

As for the tasks that are needed every user is able to do it manually, Windows allow it.

Hope this helps,

Kudos0

Re: CPU Usage about 30%

This worked for me.  Thank you very much.  Do you know if ends up having much impact on .net apps if they remain disabled?

Kudos1 Stats

Re: CPU Usage about 30%

Thanks for responding TradesmanNorton. I wasn't entirely sure I'd helped anyone.

It will make some applications slower to start but most people won't notice the difference. It won't break anything but you should probably enable them again after Norton fixes the issue.

.Net applications need to be compiled into machine language before they will run. This happens automatically when you start the application. The Native Image Generator pre-compiles applications and stores them ready to go in a cache. It saves a little time.

It's like packing the car the night before a camping trip. You're quicker out the door and onto the road but it makes no difference once your driving.

Disabling maintenance entirely as suggested by Apostolos will affect many unrelated things including Windows security updates. It's like nuking a rabbit for digging holes in your garden.

Thanks for the feedback lmacri. The tasks launch the standard versions from "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe" and "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe". They use less than 1% CPU if you disable auto-protect and complete on my machine in a few minutes. I'll try your other two suggestions on the virtual machine but I don't think they'll make a difference. It's not the files themselves causing false positives but what they do that clashes. I never tried Norton's performance monitoring. I was using Process Explorer and Task Manager. I'm unsure what extra details I could garner from Norton but I'll take a look.

Edit: Those tasks do exist on a default installation of Windows 10 but they're disabled. I enabled them manually and it triggered this high CPU behaviour on a vanilla machine with just Norton. Default Windows 10, default Norton, enable the two lower NGEN tasks that run on idle and you'll get the persistent high CPU. No need to install Visual Studio.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

mickhardy, didn't help for me. It took my PC around 15 minutes to slow down CPU usage by nortonsecurity.exe even after idle period was over. Still looking for a solution. Thank you all for helping me.

Kudos0

Re: CPU Usage about 30%

Well that's a shame Vlad1ki3. It definitely fixed my two computers. I'm so used to the fans racing all night, it seems odd waking up to silence. Sorry I can't help any further.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Waited for 20 minutes. 0% of usage. I guess that you successfully solved my issue!

Thank you so much! Good luck and have a great day!

Kudos0

Re: CPU Usage about 30%

mickhardy:..
The tasks launch the standard versions from "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe" and "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe". They use less than 1% CPU if you disable auto-protect and complete on my machine in a few minutes. I'll try your other two suggestions on the virtual machine but I don't think they'll make a difference. It's not the files themselves causing false positives but what they do that clashes....
 

Edit: Those tasks do exist on a default installation of Windows 10 but they're disabled. I enabled them manually and it triggered this high CPU behaviour on a vanilla machine with just Norton. Default Windows 10, default Norton, enable the two lower NGEN tasks that run on idle and you'll get the persistent high CPU. No need to install Visual Studio.

Hi mickhardy:

No worries, I was just curious about the trust ratings of the NGEN files.  If files like ngen.exe aren't fully trusted by Norton they might be triggering the real-time heuristic (behaviour-based) protection of Norton's SONAR (Symantec Online Network for Advanced Response - see the Behavior tab at https://www.symantec.com/theme/star) to "wake up" and monitor their behaviour, which would be a different mechanism than the "traditional" file-based (SHA-256 hash signature) detection of suspicious files during file scans.  I don't know if there was an update to the SONAR engine around the time that your problem started but my assumption (which might be wrong) is that if these NGEN files are fully trusted / whitelisted then they should be ignored by SONAR.

It would be helpful if one of the Norton employees could follow up on this.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.14.0.54 * MB v3.3.1

Kudos1 Stats

Re: CPU Usage about 30%

Hi Imacri,

The files in question are listed as trusted. Disabling sonar doesn't help. Adding the four files to the exclusions for auto-protect and sonar doesn't help.

The performance monitor shows Norton using moderate CPU but no alerts or notifications during the high CPU usage. Disabling auto-protect and allowing the tasks to run to completion does not generate any alerts or notifications. It did alert me to the Google Software Reporter Tool opening 394,331 handles. Looks like Google and Norton are both on the short list to be removed from my computers.

I'm done here. Hopefully Norton resolves the issue in a timely fashion.

Cheers and thanks again for all the suggestions and help.

Mick

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Hello there. Something went wrong again=(Seems like I have to switch to Kaspersky or smth...

Kudos1 Stats

Re: CPU Usage about 30%

I can confirm this: Visual Studio 2017 Community makes fight with norton's auto protect in idle.

I had never such problem before because I recently installed the visual studio, disabling that Net Framework NGEN tasks in Task Schedular seems like solved my problem.

Note that last NGEN Critical tasks were already disabled in my case, however first two on top (non critical) was "last run time" is today 4/14/2018 and completed with failure, (process terminated unexpectdly) with some random error codes, I guess thats Norton's doing.

But my problem is solved now, I don't know if these disabled tasks can restart themselves or not, so I think deleting them can fix this %30 CPU usage problem entirely?  But I use Visual Studio to test my programs so I don't want lose my coding work in some way.

I will reply back here if the problem returns.

Kudos0

Re: CPU Usage about 30%

I don't know if anyone else is watching this thread, but I have been dealing with this problem for a while, also - nortonsecurity.exe (SYSTEM user) grabbing 25% or 50% (that is 100% of 1 or 2 logical CPUs - I have 4 logical CPUs on this machine).  After working with the usual solutions from the support folks (Norton Power Eraser, remove/reinstall, etc.) all I did to fix the problem (seemingly permanently) is right-click on the Norton icon in the system tray and select Auto-protect Disable. I disabled it for the default time period (15 minutes) and allowed the system to re-enable it after the timeout period.  Since then, I have had no problems with the Norton program grabbing 25% or 50% of my system.  I have re-booted, shut down and restarted, and I even did a full remove/reinstall earlier, and have had no issues after completely reinstalling the product.

Kudos0

Re: CPU Usage about 30%

Hello JEJinMD

Good News !

Have a Good Night and

Thanks.

Success always occurs in private and failure in full view. Windows 7 Pro 64 bit NS with BackUp 22.15.0.88 Core Firmware 260 I E 11
Kudos0

Re: CPU Usage about 30%

I want to offer my solution of this problem:

I found in "Task Schedule" a "\Norton Security\Norton Security Error Processor" https://i.imgur.com/8jcxC08.png

That process runs after 5 min. of idle. Interesting. I try to delete this task, but it repair automatically after some time.

I write a small script to solve this https :// mega .nz/#F!BEZEjaAS!_ 5K7BwpJEe8RTUqBsJfPxg

You must unzip the archive to static folder (unchangeable) and run "Norton autodelete idle.exe" response must be "SUCCESS: The scheduled task "Norton delete idle processes" has successfully been created.". It program create schedule that in 4'th min idle remove all "\Norton Security\*" tasks.

If you afraid run "*.exe" from archive, then you can install a program "advanced bat to exe converter" and build programs from folder "\src"

[Edit: Removing external scripts to conform with the Participation Guidelines and Terms of Service]

Kudos0

Re: CPU Usage about 30%

book777:

I found in "Task Schedule" a "\Norton Security\Norton Security Error Processor"...

Hi book777:

Those tasks are related SymErr.exe (Symantec Error Reporting) submissions - see noghere's thread Two New Start Tasks After Update to 22.12.1.14 Version as well as Symantec employee maverick786's comment in the thread symerr.exe.

I suspect a simpler (and safer) way to stop the idletime activity related to those tasks would be to simply set Detailed Data Error Collection to Never and Norton Community Watch to OFF in Settings | Administrative Settings as shown below.  This will disable the Norton Community Watch submissions to Symantec during system idles (see Settings | Administrative Settings | Background Tasks | Configure for a list of Norton tasks that will run during system idles with default settings) and should also stop the logging of these submissions at Security | History under the headings Norton Error Reporting and Norton Community Watch.  See the support article Norton Community Watch Settings.

The high CPU activity by nortonsecurity.exe being discussed in this thread appears to be related to a problem with Norton's real-time protection (Auto-Protect), not a "normal" background idletime task like Norton Community Watch.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.14.0.54 * MB Free v3.4.5

Kudos0

Re: CPU Usage about 30%

That sounds like a better solution Imacri. Does Imacri's solution address your CPU usage Book777?

Book777 presents a classic example of just how much time customers are spending trying to resolve this issue and it seems to be presenting for a few different reasons. Norton should step up and address this or at least acknowledge it.

JEJinMD's solution doesn't work for me. I spent many nights with auto-protect disabled to avoid the issue before I discovered my workaround.

Windows 10 1709 (Build 16299.309) : i7-6700K @ 4.00GHz : 32GB RAM : GeForce GTX 1070 : Acer Predator x34 : Norton Security V22.14.0.54
Kudos0

Re: CPU Usage about 30%

Hopefully this issue can be solved as several times I've returned to my idle computer to hear the fans humming away, and seemingly nothing else going on according to the MS Task Manager !   

Windows 10 Home X64 Norton Security Premium---Current

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