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Kudos0

nortonsecurity.exe running at high cpu for long time

For the last few days, nortonsecurity.exe has been running the cpu at near 100% until I stop it (by using mouse or keyboard). This is not a new installation.

Labels: Performance

Replies

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

Hi m333617:

The next time you have one of these long periods of high CPU consumption while your system is idle, bring your system out of idle mode and go to Settings | Administrative Settings | Background Tasks | Configure and see if one of your background Norton tasks like Automatic LiveUpdate or Norton Community Watch has a status of Canceled (i.e., paused until the next system idle) or a long duration time.  Here's an old screenshot from my own computer showing an Automatic LiveUpdate that ran for over 2 hours but never ran to completion and was canceled when I brought my system out of idle mode.  If I remember correctly, the Last Run column of that Background Tasks window shows the last date/time the task successfully ran to completion, not the last date/time the task was started.

If you see long periods of high disk activity (reads/writes) at the same time as your high CPU consumption, check to see if either of these tasks is enabled (or has been re-enabled by a recent product update):

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

Both disk defrag settings are enabled by default in Norton, and many users in this forum disable these unnecessary defrags and let their built-in Windows Disk Defragmenter handle their defrags.
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32-bit Vista Home Premium SP2 * Firefox ESR v52.7.3 * NS Premium v22.12.1.15

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

Norton running background tasks while the system is idle is normal. That way, the maximum cpu utilization allows the tasks to complete quickly. 

As long as it drops and pauses the tasks when you move the mouse or start typing, things are working normally.

Things happen. Export/Backup your Norton Password Manager data.
Kudos0

Re: nortonsecurity.exe running at high cpu for long time

Thanks for responding. I'm on lunch break now and don't have time to do what you suggested. I'll try it later.

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

Thanks for your response. The thing is I've had Norton for several years and am familiar with how it works. What its doing now is not normal. It causes the cpu to run at near 100% and I've let it go for really long periods of time and it never catches up. After hearing the fans running full speed for a really long time, I give up on it and move the mouse to make it stop.

When I have time, I'll try the suggestions of the previous poster.

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

I'm seeing the same problem, just within the past few days. It's not just doing some tasks during idle time (like before), rather within a minute or two of the system being idle the CPU utilization is so high, the fan starts up and doesn't stop. I tried turning off optimization and there were no background Norton processes that had canceled. I had it update to the latest version of Norton, rebooted a number of times, with the same result. When the CPU is pegged and I log in, it shows the utilization at 80-90%. And as I said, it never stops if the computer is idle, so much so that the computer (a laptop) is actually hot. I am now going to turn the machine off for periods that I don't use it. I believe this is a regression and needs a fix. Please keep us posted. Thanks!
Kudos0

Re: nortonsecurity.exe running at high cpu for long time

dsiebold:
I'm seeing the same problem, just within the past few days. It's not just doing some tasks during idle time (like before), rather within a minute or two of the system being idle the CPU utilization is so high, the fan starts up and doesn't stop. I tried turning off optimization and there were no background Norton processes that had canceled....

Hi dsiebold:

It sounds like you were able to confirm in Task Manager that nortonsecurity.exe is the process responsible for your long periods of high CPU consumption.  Note that if you just disabled both disk optimizer (defragmenter) settings in Norton as instructed <here> or scheduled a custom / full system scan ( at Settings | Antivirus | Scans and Risks | Full System Scan | Configure) that runs during idles that these tasks must run to completion once they are started and might continue to run for a long period of time, even after they are disabled.

What is your Windows OS, and what is you Norton product name and version number(open Norton and go to Help | General Information | About)? If you have a Win 8.x or Win 10 OS, ensure that the Fast Startup power option is disabled as described in peterweb's thread Windows 8/8.1 or 10 and Fast Start Feature and then re-boot your system a few times after this setting is disabled.  This Fast Startup feature can interfere with product updates and loading of Norton services at boot-up and result in all sorts of odd glitches and unexpected behaviour on Win 8.x and Win 10 computers.

If Fast Startup isn't the cause of the problem, allow your system to go into idle mode and wait for another extended period of high CPU consumption.  Then check the CPU consumption in your Norton Performance Graph (Performance | Graph | Usage | CPU tab) and click inside the area of high CPU consumption by nortonsecurity.exe (i.e., yellow peaks) during a system idle.  Does the pop-up list another non-Norton process running at the same time?  If you have some other process running during system idles like an automatic software updater that Norton doesn't fully trust it's possible that Norton's Auto-Protect is "waking up" during system idles to monitor this process.

If you still can't find any explanation for the high CPU consumption by nortonsecurity.exe during idles then it's always possible that there was a glitch during a recent product update that has corrupted your Norton installation.  Run the Norton Remove and Reinstall (NRnR) tool as instructed at https://www.norton.com/nrnr to refresh your Norton installation.  Be sure to run multiple manual LiveUpdates until you are fully patched to the latest Norton v22.12.1.15  and no further updates are available.
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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: nortonsecurity.exe running at high cpu for long time

Hi, Imacri. Sorry to be slow getting back to you. I've been really busy. As to your suggestion regarding the defragging function of Norton, I disabled that when I first installed Norton because I have an SSD and those don't need defragging. I just checked both of the settings you mentioned to confirm it is off both places and it is.

I also just checked Windows installed programs and see that Norton shows as being installed on my computer on the 23rd, so I guess they must have downloaded a new version on that day through the automatic updates. That's about when I started having trouble so I suspect that's the problem. Maybe I'll try the remove and reinstall. But since other folks are having the same problem I'm having, it may come down to waiting for Norton push down a fix.

And as to the fast start feature you mentioned, I remember reading about that when Windows 8 was new, but I never realized you could turn it off. I've done that now. Thanks for the tip.

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

rn333617:

...I also just checked Windows installed programs and see that Norton shows as being installed on my computer on the 23rd, so I guess they must have downloaded a new version on that day through the automatic updates. That's about when I started having trouble so I suspect that's the problem....

Hi rn333617:

Thanks for the update, and be sure to post back if running the Norton Remove and Reinstall (NRnR) tool to refresh your installation as instructed at https://www.norton.com/nrnr doesn't fix the problem. I can provide alternate instructions for performing a deeper wipe and clean reinstall of your current Norton installation but a clean reinstall is more time-consuming because it will remove all your personal settings and configuration files (as well as any other Norton product installed on your system).  I'm still hoping your problem was caused by a glitch during a recent update (which happens frequently on my Vista machine) rather than a bug in the latest v22.12.1.15.

Also note that the product update announcement Norton 22.12.1 Product Update Available Now states that "You may need to run LiveUpdate and reboot a few times before your product is completely updated to the latest version."  If you aren't in the habit of shutting down and re-booting your computer each day you might want to try that suggestion first before running the NRnR tool.
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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: nortonsecurity.exe running at high cpu for long time

removed, having not exactly the same issue
Kudos0

Re: nortonsecurity.exe running at high cpu for long time

rn333617:

...What its doing now is not normal. It causes the cpu to run at near 100% and I've let it go for really long periods of time and it never catches up. After hearing the fans running full speed for a really long time, I give up on it and move the mouse to make it stop.

Hi rn333617 / dsiebold:

User mickhardy has just posted similar comments about unusual and excessive CPU activity by nortonsecurity.exe during system idles in the thread CPU Usage about 30%.  If you tried refreshing your v22.12.1.15 installation with the Norton Remove and Reinstall tool as suggested <here> be sure to let us know if it helped or not.
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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: nortonsecurity.exe running at high cpu for long time

I tried disabling fast startup (much to my chagrin), removing all the defrag options, making sure nothing in the settings was canceled and that Norton was up to date. The CPU issue is still happening. I'm going to hold off on the NRnR since the above poster said it didn't help. I turn my computer off when it's not in use.

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

Hi dsiebold:

Just an FYI that a new Norton v22.14.0.54 started rolling out yesterday (05-Apr-2018) - see the product update announcement Norton 22.14 Product Update available now.

If the v22.14.0.54 update doesn't help and Norton Customer Support can't offer a solution (Live Chat is available at https://www.norton.com/chat), it might be worthwhile trying a clean re-install of Norton using the Norton Remove and Reinstall (NRnR) tool in advanced "Remove Only" mode (https://www.norton.com/nrt), which is more aggressive than a regular refresh of your installation with the NRnR tool in "regular" mode (https://www.norton.com/nrnr).

Instructions for a clean re-install are posted in freespace77's thread Windows defender still active.
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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: nortonsecurity.exe running at high cpu for long time

I've posted a potential solution in this thread.

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: nortonsecurity.exe running at high cpu for long time

mickhardy:

I've posted a potential solution in this thread.

Me too!

Cheers, 

Kudos0

Re: nortonsecurity.exe running at high cpu for long time

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