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Kudos0

Nav.exe virus?

Is this a thing? I think I may have it, my disk usage is skyrocketting to 100% every time my computer is running.

Replies

Kudos0

Re: Nav.exe virus?

Hi whhhhhhhhhhhy:

NAV.exe is the filename of the main executable for Norton AntiVirus.  Could you let us know your Windows OS and Norton product [I presume Norton AntiVirus (NAV) but let us know if you've switched to Norton Internet Security (NIS), Norton 360 (N360) or the latest Norton Security (NS)] as well as your product version number (click on Support | About - the latest NAV is v. 21.6.0.32).  Also let us know if you ever had any other antivirus software installed on your computer (e.g., McAfee, Kaspersky, etc.), even if it was a trial version that came pre-installed at the factory and has already been removed from your system.

Are you able to tell if the NAV.exe file causing your high disk usage is located in your Norton installation folder (e.g., in a subfolder of C:\Program Files (x86)\Norton AntiVirus\ or a folder with a similar name)?  If so, it's likely a legitimate NAV.exe file and not malware, and we'll provide instructions on how to reinstall your Norton product to see if this solves the problem.
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32-bit Vista Home Premium SP2 * Firefox 36.0 * NIS 2014 v. 21.6.0.32 * MBAM Premium 2.0.4
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS

Kudos0

Re: Nav.exe virus?

Hi whhhhhhhhhhhy:

When you post back, could you also clarify if NAV.exe is only consuming high CPU and/or performing a high number of disk read/writes when your system is idle?  If so, there are a few background Norton tasks like Full System Scans and Insight Optimizer (a disk defragmenter also known as Idle Time Optimizer) that can consume significant system resources during idles depending on your hardware configuration.  If you aren't sure when NAV.exe is running you can click the Performance link in your main Norton window to monitor your NAV.exe activity in real time in the Performance Graph - Norton activity is shown as yellow peaks and if you click on a peak the name of the process (or processes) is displayed in the pop-up.

If your high NAV.exe activity only occurs during system idles, you might be able to identify the exact task responsible for the high activity by comparing the time in the LastRun column of your Norton Tasks window (Performance | Norton Tasks).
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32-bit Vista Home Premium SP2 * Firefox 36.0 * NIS 2014 v. 21.6.0.32 * MBAM Premium 2.0.4
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS

Kudos0

Re: Nav.exe virus?

I'll have the same problem it start this year not before. Disc tab shows 100% in task manager. i m using norton basic antivirus. Nav.exe using all the space it also slows and hangs my pc sometimes touchpad gastures also don't work. This file also read and write highest number of packets. I'll update my antivirus Everytime when an update comesb but none of the updates solve my problem . I m using Lenovo's ideapad z500 laptop heaving i5 processor and 4gb ram. Please help me Symantec. (sometimes it also uses high percentage of cpu.)

Kudos0

Re: Nav.exe virus?

Hello ramindergill0101

Since you are using a Lenovo, are you affected by the Superfish malware? Welcome to the Norton Community also. What version of NAV are you using?

Success always occurs in private and failure in full view. Windows 7 Pro 64 bit NSBU 22.16.2.22 Core Firmware 270 I E 11 Chrome
Kudos0

Re: Nav.exe virus?

I didn't find superfish or another unknown program installed on my laptop also no certificate of superfish in Mozilla firebox certificates list but Mozilla's homepage get replaced by stupid search engine instead of google or bing. And i m using 21.6.0.32 version of Nav.

Kudos0

Re: Nav.exe virus?

Hello

Are you using Firefox 36? We have had some reports of that slowing down some computers or laptops.

Success always occurs in private and failure in full view. Windows 7 Pro 64 bit NSBU 22.16.2.22 Core Firmware 270 I E 11 Chrome
Kudos0

Re: Nav.exe virus?

I m using latest version of firebox. Also auto startup is disabled. it only start when i want to use it so firebox is not the problem. I'm sure about this. Problem is main nav background process that takes more than 75% of disc space. I have seen so many Norton users have same problem . All of my automatic startup programs are disabled only system apps and drivers are allowed to start automatically. No unwanted program installed. Also i clear temp files after every use still my laptop hangs. This is really irritating.
Kudos0

Re: Nav.exe virus?

Hello

Since your home page is getting changed by something and your computer is hanging, I would recommend a stop at one of the free malware removal sites. You may not have Superfish, besides Norton should catch that. The free sites can check out your computer to see if you have any malware. They will work with you until your computer is clean. Here is the list. Don't try any more scans on your own as it may make it harder to find and clean up.




(Thanks to Delph for providing the list of sites)

Please see this link for an up to date description of these sites plus the addition of a newly listed site formed by one of our successful malware remover users. The new site is listed first in this link.

https://community.norton.com/en/forums/malware-removal-forum-recommendations

Please come back and let us know how you made out. Thanks

Success always occurs in private and failure in full view. Windows 7 Pro 64 bit NSBU 22.16.2.22 Core Firmware 270 I E 11 Chrome
Kudos0

Re: Nav.exe virus?

sorry, I don't try these links because of slower WiFi connection but i find the main problem. Norton automatic background full scans make it happens (making disc usage to 100%). when the "starting full scan" popup appears and automatic scan starts then disc fills up 100%. I think if there is any way to disable these background scans then my problem get solution. Before this scan system working fine and disc also showing 3% this task reads 4,700,000,000 bites.Well other programs not even reading half of this. Also this is a system background process so i m not able to end this process from task manager manually. before it i have same problem with NVIDIA driver so i rollback driver to previous version and problem get solved i have also done same think with office 365. mainly i want to kill that background scan task.

Thanks for previous help.

Kudos0

Re: Nav.exe virus?

Hi ramindergill0101:

You can disable your idletime Full System Scans at Settings | Computer | Computer Scan | Full System Scan | Configure (choose Do not schedule this scan) and run your full system scans manually every month or so at a time of your own choosing, but there is nothing you can do to stop idletime Quick Scans.  These Quick Scans are scheduled to run every time LiveUpdate delivers a update for Norton's Virus Definition set. Norton background tasks should only run during system idles and should pause temporarily when you start browsing the Internet or do something to bring your system out of idle ( the status of the task at Performance | Norton Tasks will temporarily change from Running to Canceled when this task is interrupted).  Adjusting your Idle Time settings (Settings | General | Norton Tasks - e.g., decreasing Automatic Tasks Delay to 10 min and Idle Time Out to 5 min) will help to ensure that your background tasks have adequate time to run to completion during system idles.  I would also suggest disabling the Insight Optimizer task (Settings | General | Norton Tasks | Idle Time Optimizer | OFF) and just let Windows handle your disk defrags.

Regarding your comments "Disc tab shows 100% in task manager" and "Nav.exe using all the space", a high read/write file transfer rate for nav.exe (in kb/sec) is not necessarily a reason for concern since this is only a measure of the speed at which nav.exe is reading/writing files on your hard drive.  If the indicator light for your hard drive stays on and your Task Manager shows that the Highest Active Time is close to 100%, this means that your hard drive is very busy servicing read or write requests - see the tutorial How to Use the Resource Monitor in Windows 7 & Windows 8 for more details .  This is not unusual if this happens while your system is idle and NAV is performing a resource-intensive background maintenance task like a system scan or disk defrag, but if your hard drive is constantly thrashing outside of idles for extended periods of time (i.e., when when you're browsing the Internet or working on your computer) and Task Manager indicates that NAV.exe is the culprit then this is definitely a problem and we should investigate further.
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32-bit Vista Home Premium SP2 * Firefox 36.0 * NIS 2014 v. 21.6.0.32 * MBAM Premium 2.0.4
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS

Kudos0

Re: Nav.exe virus?

ramindergill0101:

I m using Lenovo's ideapad z500 laptop heaving i5 processor and 4gb ram.

Hi ramindergill0101:

This likely has nothing to do with your high disk activity, but I found the tech specs <here> for a Lenovo Z500 Touch laptop.  If your system has a similar configuration then it came with a large number of pre-installed software programs, including a trial version of McAfee Antivirus Plus.  If you haven't already done so, you should uninstall McAfee from Control Panel | Programs and Features, re-boot, and then remove all traces of this software with the McAfee Consumer Products Removal (MCPR) tool (see Step 2 for the download link to MCPR.exe), since traces of McAfee registry entries and files remaining after the uninstall could still affect the functionality of NAV.  If your Lenovo Z500 had a different antivirus product pre-installed at the factory, links to removal tools for several different antivirus products can be found <here> on the ESET site.

If you still feel that NAV is consuming excessive system resources after running the MCPR tool, you can also install a fresh copy of NAV by running the Norton Remove and Reinstall (NRnR) tool at www.norton.com/nrnr.  Just be aware that the NRnR tool will remove all Norton products from your system, so if you have Norton Ghost, Norton Utilities or other Norton products installed besides NAV then read the instructions carefully before proceeding.  Once NAV is reinstalled on your system you should run manual LiveUpdates until you have the current v. 21.6.0.32 and no further updates are available.  It might require several cycles of consecutive LiveUpdates and re-boots before NAV is fully patched.

If you aren't familiar with the recent controversy surrounding Lenovo notebooks and the SuperFish spyware, please read the ZDNet article How to Remove Superfish Adware From your Laptop (kudos to floplot for posting the link <here> in the Tech Outpost board).  According to that article, this spyware was installed on Lenovo Win 8.1 computers sold some time between September 2014 and January 2015.  The Lenovo support article <here> has a link to removal instructions for SuperFish but according to that article your Z500 laptop does not appear to be one of the affected models.
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32-bit Vista Home Premium SP2 * Firefox 36.0 * NIS 2014 v. 21.6.0.32 * MBAM Premium 2.0.4
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS

Kudos0

Re: Nav.exe virus?

Thanks for these information. But my laptop is not touch version. And tech specs are i5,4gb ram,1tb hdd,1gb graphics card (NVIDIA GeForce 740m), also my laptop come with windows 8 pre installed and now its upgraded to windows 8.1. So you tell about mc cafe and other preinstalled programs but i already removed unwanted programs as i tell before in these conversations, also I'll be researched for superfish and superfish removal articles my laptop is not infected with it. And my nav is Latest version as you said 21.6.0.32. Sooo after getting all of this firstly i disable background auto scans of nav if problem still not solve then I'll use reinstall tool of nav. Again thanks brother for all this info.
Kudos0

Re: Nav.exe virus?

Ok, here's a good news. Disabling the background task works perfectly note disc usage is in btw 0 to 10%. I think this is the perfect solution. But one think i want to tell is when i start the laptop for some minutes disc remains 100% but after 2 to 5 minutes of usage everything work fine. Now my laptop perform much better touchpad gestures working smoothly apps running perfectly everything is alright now. Yes sometimes for 1or 2 second disc goes to 100% but this is for just 1 second so that will be okay. Thanks for help buddy.
Kudos1 Stats

Re: Nav.exe virus?

Hi ramindergill0101:

Thanks for letting us know that a Full System Scan was associated with your high disk usage.  Just note that your daily NAV Quick Scans will only scan the most common areas where malware is detected, so if you permanently disabled your idletime Full System Scans at Settings | Computer | Computer Scan | Full System Scan | Configure I would still advise that you run a manual Full System Scan about once a month when you can leave your computer idle for a few hours - see the support article About Computer Scan.

If you are going to monitor your disk activity with Task Manager, I think you'll discover a few other tasks with intensive disk read/writes that push your Highest Active Time close to 100%.  Tasks like full system scans and full disk defrags are simply easier to catch because they run for prolonged periods of time.  These periods of higher disk activity should only be a concern if they seriously impact your system performance.
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32-bit Vista Home Premium SP2 * Firefox 36.0.1 * NIS 2014 v. 21.6.0.32 * MBAM Premium 2.0.4
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS

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