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NIS hogging CPU - looks like invisible full scan

NIS is taking up to 50% or more of the CPU and interfering with the use of my PC. It feels like it's running a full system scan, but there's no sign of that in the UI. In the Recent History list I see many statistical submissions, though they don't show up in the exported log.

NIS 22.10.0.85
Windows 7 Pro 64-bit SP1
8GB RAM
Intel Core i3-3240 3.4 GHz

Log entries for today (I rebooted to see if it would clear the problem):

8/23/2017 11:40:35 AM,Info,Connected to a public network. (127.0.0.0/255.0.0.0),Protected,No Action Required,127.0.0.0/255.0.0.0,,
8/23/2017 11:40:35 AM,Info,Connected to a private network. (20 4E 7F 83 70 78),Shared,No Action Required,,20 4E 7F 83 70 78,
8/23/2017 11:36:59 AM,Info,"Protecting your connection to a newly detected network on adapter \"Intel(R) 82579LM Gigabit Network Connection\" (IP address: 192.168.1.75).",Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 11:36:59 AM,Info,IP address has disappeared from adapter Intel(R) 82579LM Gigabit Network Connection (IP address: 169.254.4.227).,Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 11:36:43 AM,Info,"Protecting your connection to a newly detected network on adapter \"Intel(R) 82579LM Gigabit Network Connection\" (IP address: fe80::cd66:424e:de03:4e3%11).",Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 11:36:43 AM,Info,"Protecting your connection to a newly detected network on adapter \"Intel(R) 82579LM Gigabit Network Connection\" (IP address: 169.254.4.227).",Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 11:36:31 AM,Info,"Protecting your connection to a newly detected network on adapter \"Software Loopback Interface 1\" (IP address: ::1).",Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 11:36:31 AM,Info,"Protecting your connection to a newly detected network on adapter \"Software Loopback Interface 1\" (IP address: 127.0.0.1).",Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 9:26:46 AM,Info,"Protecting your connection to a newly detected network on adapter \"Intel(R) 82579LM Gigabit Network Connection\" (IP address: fe80::cd66:424e:de03:4e3%11).",Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 9:26:46 AM,Info,IP address has disappeared from adapter Teredo Tunneling Pseudo-Interface (IP address: fe80::e0:0:0:0%14).,Detected,No Action Required,,,Firewall - Network and Connections
8/23/2017 9:26:46 AM,Info,"Protecting your connection to a newly detected network on adapter \"Intel(R) 82579LM Gigabit Network Connection\" (IP address: 192.168.1.75).",Detected,No Action Required,,,Firewall - Network and Connections
8/22/2017 6:02:46 PM,Info,"Protecting your connection to a newly detected network

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Re: NIS hogging CPU - looks like invisible full scan

Indeed there was an invisible full system scan going on. It showed up in Recent History once it was done.

8/23/2017 1:39:31 PM,Info,Full System Scan results,Completed,0:01:38:55,"1,452,212","1,448,622",819,"2,141",626,4,"26,937","187,852",0,0,0

This seems like a bug. I should be able to pause a scan if it's interfering with my work.

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Re: NIS hogging CPU - looks like invisible full scan

Hi, Robert. You can go to Settings > Antivirus> Scans and Risks, and scroll down to Full Scan > Configure.

There, you can change the option to only run Full Scans manually.

You can then run a scan at a time that suits you. Also see my comment here in another thread.

https://community.norton.com/en/comment/7588171#comment-7588171

Windows 10 Home X 64 Norton Security Premium Current
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Re: NIS hogging CPU - looks like invisible full scan

This seems like a bug. I should be able to pause a scan if it's interfering with my work

It is not a bug and you can pause or stop the scan if you wish so:    Norton UI > Security > Scans > Custom Scan click Go. 

In the Scans window, click

and the running scan will appear. You can now click Pause to suspend it temporarily or click Stop to terminate the scan.            

Windows 7 HP SP1 32-bit | Chrome 65.0.3325.146 | NS 22.12.1.15
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Re: NIS hogging CPU - looks like invisible full scan

It's not a bug that there is no indication that a full scan is running?

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Re: NIS hogging CPU - looks like invisible full scan

I still think it is not a bug, maybe a tortuous way to get to see the scan run.  On the other hand if a full scan is running someone must have scheduled it or clicked on it to run.....

Windows 7 HP SP1 32-bit | Chrome 65.0.3325.146 | NS 22.12.1.15
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Re: NIS hogging CPU - looks like invisible full scan

Since I am not fully aware, does Norton do regular scans on its own? Monthly? Weekly? It could have been pre scheduled, or suspicious activity detected to trigger the scan?

好评1 Stats

Re: NIS hogging CPU - looks like invisible full scan

Since I am not fully aware, does Norton do regular scans on its own?

It used to until some years ago, but not anymore.

Windows 7 HP SP1 32-bit | Chrome 65.0.3325.146 | NS 22.12.1.15
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Re: NIS hogging CPU - looks like invisible full scan

Hello

Norton does do a scan when first installed. It will keep at it until it gets completed. There is a lot of background work that needs to get done. If you change the time it takes your computer to become idle to a very short time, then the background work will get done more quickly.

Thanks.

Success always occurs in private and failure in full view. Windows 7 Pro 64 bit NSBU 22.17.0.183 Core Firmware 282 I E 11 Chrome latest version.
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Re: NIS hogging CPU - looks like invisible full scan

I installed Norton on this computer when I got it three years ago and have not seen this before.

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Re: NIS hogging CPU - looks like invisible full scan

It's only supposed to run while your computer is idle. The fact that you are seeing it still running means something must have gone wrong with the idle detection (I've seen that at least once).

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Re: NIS hogging CPU - looks like invisible full scan

You could try a complete reinstall. Using Norton's Remove and Reinstall Tool. Maybe something has gone wrong during the install. A low chance, but could be possible. 

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Re: NIS hogging CPU - looks like invisible full scan

By default a full system scan is scheduled for once a month. Norton will try to execute this scan at the indicated time, but  if your system is busy it will delay it. At some time, if the system is never idle long enough to complete the scan, it will just go ahead and run in the background.

You can disable any background full system scans.

Things happen. Export/Backup your Norton Password Manager data.

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