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Firefox + NOD32 Antivirus = CPU overuse/overheat & reduced browsing speed?

  • 6 replies
  • 102 have this problem
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  • Last reply by Ancient

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Are there any known issues between NOD32 Antivirus and Mozilla Firefox?

Description of the problem: Each time I'm browsing with Firefox, a process called "ekrn.exe" (I'm assuming this is NOD32) begins to consume close to 50% of CPU resources (otherwise its CPU usage is negligible). This noticeably reduces browsing speed and overall PC performance and causes CPU to heat up rapidly (from the usual 40°C to about 60°C in seconds). The issue does not occur when using other browsers (tested with Google Chrome and Opera 11, same web sites) .

I'm using Eset NOD32 Antivirus version 4.2.64.12 running on Windows XP (32-bit) version 5.1.2600 Service Pack 3 and Mozilla Firefox version 3.6.13.

Are there any known issues between NOD32 Antivirus and Mozilla Firefox? Description of the problem: Each time I'm browsing with Firefox, a process called "ekrn.exe" (I'm assuming this is NOD32) begins to consume close to 50% of CPU resources (otherwise its CPU usage is negligible). This noticeably reduces browsing speed and overall PC performance and causes CPU to heat up rapidly (from the usual 40°C to about 60°C in seconds). The issue does not occur when using other browsers (tested with Google Chrome and Opera 11, same web sites) . I'm using Eset NOD32 Antivirus version 4.2.64.12 running on Windows XP (32-bit) version 5.1.2600 Service Pack 3 and Mozilla Firefox version 3.6.13.

All Replies (6)

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Ye, i had same problem with windows 7 i found this: http://www.exe-error-fixes.com/ekrnexe-high-amount-cpu/ and used method 4.

working but i think it is not good  solution on long-term
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Do you have "Yet Another Smooth Scrolling" addon instaled? Try to disable it. It's helped in my case.

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Sorry that's helped just for a while. The only way I've found - clear recent history.

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Ye, i had same problem with windows 7 i found this: http://www.exe-error-fixes.com/ekrnexe-high-amount-cpu/ and used method 4.

working but i think it is not good  solution on long-term

Method 4 worked for me too. I am running FF4 RC2, Win7 SP1 and NOD32 4.0.424. I don't like that I have to disable some of my antivirus functions. Until the FF4 RC2 update, FF worked just fine... I hope they fix it real soon!

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Creating a new profile seems to have worked also. I reset the altered options in NOD32 back to their normal state and FF4 RC2 is starting up as per normal.

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Nice job guys, you really can't make something without having to fix it later can't you ?

Anyways... I had this shit too (firefox 4.0 rtm / win7 x64)... And actually "ovidescu" bumped me to playing with profile... So ye, that's what I've been doing, manually copy/pasting all files from my 3.6 profile into the new profile on 4.0 and after pasting each file I started the browser to see did this file create the glitch or not... And well I think I found the files responsible for this glitch, they are all sessionstore.js's... I don't know why, but these files cause this glitch with NOD32, at least on my system... In the end I copy/pasted all of my profile files, except for these and sessionstore.bak and the problem was solved...

So when you back up your profile - don't copy these files)))

Modified by Ancient