Author Topic: Massive CPU usage by Avast service  (Read 1256 times)

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Offline jfday

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Massive CPU usage by Avast service
« on: August 09, 2020, 04:32:18 PM »
Has anyone else been having problems with Avast service consuming ridiculous resources?  It's been inconsistent, but has been regularly spiking above 90% CPU usage, and is usually staying above 40-50%.  I cannot stop the service and don't really want to uninstall Avast if I can avoid it.  Any suggestions?

Offline Asyn

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Re: Massive CPU usage by Avast service
« Reply #1 on: August 09, 2020, 05:14:30 PM »
- Which Avast..? (Free/Pro/IS/Premium)
- Which version/build of Avast..?
- OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
W8.1 [x64] - Avast PremSec 22.7.7366.BC [UI.713] - Firefox ESR 91.11 [NS/uBO/PB] - Thunderbird 91.11
Avast-Tools: Secure Browser 103.0 - Cleanup 22.2 - SecureLine 5.18 - DriverUpdater 22.2 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline jfday

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Re: Massive CPU usage by Avast service
« Reply #2 on: August 09, 2020, 06:09:19 PM »
- Which Avast..? (Free/Pro/IS/Premium)
Free
- Which version/build of Avast..?
I am unable to find a version number for Avast, but it updated yesterday.
- OS..? (32/64 Bit..? - which SP/Build..?)
Windows 10 Home build 19041.388
- Other security related software installed..?
I have Malwarebytes installed, but I do not run it actively, I just use it to scan if I run into an issue.  Neither it nor Avast found anything today.
- Which AV(s) did you use before Avast..?
I installed Avast when I got the computer, no other AV programs have run on it.

Offline Asyn

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Re: Massive CPU usage by Avast service
« Reply #3 on: August 09, 2020, 06:12:46 PM »
1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
2. Follow instructions: https://www.avast.com/uninstall-utility (Run this tool for all prior installed Avast versions..!!)
3. Reinstall Avast with the downloaded installer from point 1.
4. Reboot.

PS: Regarding Avast & Malwarebytes, see: https://forums.malwarebytes.com/topic/200324-exclusions-for-avast-users/
W8.1 [x64] - Avast PremSec 22.7.7366.BC [UI.713] - Firefox ESR 91.11 [NS/uBO/PB] - Thunderbird 91.11
Avast-Tools: Secure Browser 103.0 - Cleanup 22.2 - SecureLine 5.18 - DriverUpdater 22.2 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline jfday

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Re: Massive CPU usage by Avast service
« Reply #4 on: August 09, 2020, 06:53:32 PM »
The reinstall appears to have done the trick, thank you very much, particularly for the tip on using the uninstall tool from Avast.

Offline Asyn

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Re: Massive CPU usage by Avast service
« Reply #5 on: August 10, 2020, 07:07:26 AM »
You're welcome.
W8.1 [x64] - Avast PremSec 22.7.7366.BC [UI.713] - Firefox ESR 91.11 [NS/uBO/PB] - Thunderbird 91.11
Avast-Tools: Secure Browser 103.0 - Cleanup 22.2 - SecureLine 5.18 - DriverUpdater 22.2 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0