Author Topic: Avastsvc.exe always at 25% CPU, even when not running anything else!  (Read 15144 times)

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Offline roger-s

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On my Quad core/Win XP PC, avastsvc.exe always takes a minimum of 25% CPU. I now have a three-core CPU...  :o
There are no scans running, no other programs loaded, no activity what so ever. Still Avast takes 25%. Why? Why? Why?
Any ideas? Should I re-install Avast? Un-install and try something different?
I'm tired of my CPU fan running at high speed all the time. Not to mention that the PC is noticeably slower at times and occasionally "freezes" when other programs try to make heavy use of the CPU (roughly when using more than 75%).

Offline boukehengst

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #1 on: December 30, 2015, 03:13:55 PM »
My Win XP PC has exactly the same problem. Disabling all shields and rebooting the PC does not help.

UPDATE 1:
After I disabled all shields and the automatic update and rebooted the PC (for the 2nd time), the problem was solved.
The problem returned after enabling the file system shield, so this seems to be problem.
« Last Edit: December 30, 2015, 03:42:36 PM by boukehengst »

Offline Eddy

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #2 on: December 30, 2015, 03:46:47 PM »
On a side note :
Quote
I now have a three-core CPU
If you mean a Phenom 710, it is a quad core but only 3 work by default unless you change the ACC setting in the bios ;)

What exact OS/SP ?
What exact version of avast ?
Any other security (related) software installed ? (or was there)
Are all cpu cores used or just one ?
Already performed a repair of avast ?
Already did a clean installation of avast ?

Offline roger-s

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #3 on: January 01, 2016, 06:26:47 AM »
No I have a Phenom 9550 quad core but can only use 75 % of it's potential performance at the moment

What exact OS/SP: Win XP 32bit SP3
What exact version of avast ? V11.1.2245 Last updated yesterday
Any other security (related) software installed ? (or was there): Used to run Norton Professional AV but have used AVAST problem free for a couple of years now.
Are all cpu cores used or just one ? Load is fairly evenly spread among the cores.
Already performed a repair of avast ? No, except for updates.
Already did a clean installation of avast ? Not yet.

Offline roger-s

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #4 on: January 01, 2016, 06:32:47 AM »
Found out how to do repair from another forum post. Testing...
I'll be back (after restart)

Offline roger-s

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Problem remains after repair
« Reply #5 on: January 01, 2016, 06:59:51 AM »
Ran repair.
Repair completed successfully.
Restarted PC.
Avast stayed at 2-3% for about a minute, until I loaded the first program.
It's now back at a constant 25%, even after I unload the program (notepad).
Any ideas?

Online DavidR

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #6 on: January 01, 2016, 03:03:27 PM »
You say it is constant 25% - is the avast tray icon rotating (it should be) ?
WinXP ProSP3/ Core2Duo E8300/ 4GB Ram/ avast! free 18.5.2342/ Firefox ESR, uBlock Origin, uMatrix/ MailWasher Pro7.11.0/ DropMyRights/ WinPatrol+/ Drive Image 7.1/ SnagIt 10.0/ avast! mobile security
Windows 10 Home 1909 64bit/ Acer Aspire F15/ Intel Core i5 7200U 2.5GHz, 8GB DDR4 memory, 256GB SSD, 1TB HDD/ avast! free 20.2.2401 (build 20.2.5130.570) UI-1.0.505/ WinPatrol+/ Firefox, uBlock Origin, uMatrix/ MailWasher Pro

Offline roger-s

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #7 on: January 04, 2016, 09:20:12 AM »
Yes, it is.
While it's using 25% I can sit and watch Tools/Statistics and it shows absolutely no activity...


Offline Asyn

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #8 on: January 04, 2016, 09:23:13 AM »
Which Avast..? (Free/Pro/IS/Premier)
Win 8.1 [x64] - Avast PremSec 20.4.2408.B#3 [UI.518] - CC 5.65 - EEK - Firefox ESR 68.8 [NS/AOS/uBO/PB] - TB 68.8.1 - ASB/ASL.BC
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline roger-s

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #9 on: January 04, 2016, 11:21:34 AM »
Free, Version 11.1.2245

Offline Asyn

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #10 on: January 04, 2016, 11:30:46 AM »
First, be sure to get rid of all remnants of your prior installed AV(s)..!!
-> https://www.avast.com/faq.php?article=AVKB11#artTitle

Then:
1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup.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.
Win 8.1 [x64] - Avast PremSec 20.4.2408.B#3 [UI.518] - CC 5.65 - EEK - Firefox ESR 68.8 [NS/AOS/uBO/PB] - TB 68.8.1 - ASB/ASL.BC
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline roger-s

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #11 on: January 05, 2016, 11:52:02 AM »
Followed the procedure as suggested, ran the relevant removal scripts, removed Avast, re-installed Avast.
It looked good at first, until I ran a smart scan (as suggested). Smart scan ran as it should until it got to "Network Threats". The computer sat on that section for more than two hours without any progress so I stopped it. Afterwards it is back to 25% load again...

Offline Asyn

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #12 on: January 05, 2016, 11:55:02 AM »
Might be a bug, wait for one of the devs and/or submit a ticket: https://support.avast.com/support/tickets/new
Win 8.1 [x64] - Avast PremSec 20.4.2408.B#3 [UI.518] - CC 5.65 - EEK - Firefox ESR 68.8 [NS/AOS/uBO/PB] - TB 68.8.1 - ASB/ASL.BC
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline roger-s

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #13 on: January 05, 2016, 02:29:32 PM »
Tested some more,
Managed to run it for a few minutes after restart without the 25% issue but after starting a few programs it's back to square 1. One thing I've noticed (probably not related though) is that the file system shield is occasionally working on the same files over and over again. The files concerned are temp files of the web-based AMD RAIDXpert console (I run my disks in a RAID 1 set). I will uninstall or upgrade this software to see if anything changes.
Will also try the devs/ticket.

Cheers

Offline Asyn

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Re: Avastsvc.exe always at 25% CPU, even when not running anything else!
« Reply #14 on: January 05, 2016, 02:56:59 PM »
OK, report back.
Win 8.1 [x64] - Avast PremSec 20.4.2408.B#3 [UI.518] - CC 5.65 - EEK - Firefox ESR 68.8 [NS/AOS/uBO/PB] - TB 68.8.1 - ASB/ASL.BC
Deutschsprachiger Bereich -> Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0