Author Topic: avastsvc.exe 100% CPU  (Read 16176 times)

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avastsvc.exe 100% CPU
« on: January 28, 2015, 04:54:50 PM »
Software version: Latest (2015.10.0.2208), only AV installed no firewall, default settings with PUP enabled
OS: Windows 7 SP1
Previous AV: MSE (already uninstalled)
Firewall: Comodo Free, HIPS Disabled.

Problem:
I just installed latest avast AV to replace MSE on my system last week. On 3 separate occasions the CPU usage for avastsvc.exe would randomly spike to 100% on random occasions even with no application running. Disabling all real time protection (file/web/mail) would stop the CPU usage.

The latest one would be last night when I left my computer running overnight with no software running.
When I awake I hear my CPU fan was spinning full force for god knows how long already with avastsvc again being the culprit taking up 100% CPU

I have fairly beefy system (i7 4770k, 16gb RAM) and when running normal system scan Avast only takes up ~8-10% CPU usage. So I have no idea what could be causing this...

Solutions attempted:

- Full system scan with MBAM and Avast, 0 positive result
- Repair installation via program/features
- Reset settings
- Adding following line to webshield.ini
[General]
UseStreamFilter=0


Now the problem is completely random so I can't reproduce it at will, any idea what might be causing this or a known solution ?

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  • Guest
Re: avastsvc.exe 100% CPU
« Reply #1 on: January 29, 2015, 02:39:55 AM »
Did full re-install and it happened again while I was gaming.

I disabled the active protection one by one this time and discovered that it's the "Web Shield" that caused it

Any idea why ? 

Offline AndreaVr

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Re: avastsvc.exe 100% CPU
« Reply #2 on: January 29, 2015, 08:59:57 AM »
Sometimes it does to me, and on certain occasions you just disable security web and on again after a few minutes without surfing while at other times as this morning I did redo the updates, and returned to normal, however, that there is a problem about avast is obvious

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  • Guest
Re: avastsvc.exe 100% CPU
« Reply #3 on: January 29, 2015, 04:28:37 PM »
Not really an option since I often leave my PC running 24/7

I can't be having this occur randomly and have my CPU cooking for hours end when I can't stop the process.


Looks like I have to find another AV solution

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  • Guest
Re: avastsvc.exe 100% CPU
« Reply #4 on: February 18, 2015, 03:44:28 AM »
This started happening to me sometime end of January. Happened three times, bang cpu at 100%. Installed a SSD and reinstalled windows 8.1 two weeks ago. It has also happened three times so far. The latest today. Only option is to reboot.

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  • Guest
Re: avastsvc.exe 100% CPU
« Reply #5 on: February 18, 2015, 04:08:58 AM »
Problem with avast... multiple postsin the last 24 hours.

Offline Eddy

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Re: avastsvc.exe 100% CPU
« Reply #6 on: February 18, 2015, 04:18:57 AM »
Look in taskmanager to see if there is a svchost running at 90+%
It there is use process explorer from Sysinternals (Microsoft), to see if dnsrslvr.dll is using it.
If it does, kill the process and the problem should be solved.

Offline Eddy

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Re: avastsvc.exe 100% CPU
« Reply #7 on: February 22, 2015, 04:42:56 PM »
If it is dnsrslvr.dll that is causing it, it is not (yet) fixed.
avast does know about the problem and are working on it.

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  • Guest
Re: avastsvc.exe 100% CPU
« Reply #8 on: February 24, 2015, 10:14:15 AM »
This is BAD....is this gonna get fixed?  I don't want my power supply or fans to burn up...my computer isn't even that old!!  It goes to 100% and I can't do anything...can't open a web page even.  Had to go to the laptop to look it up to see if it was a virus.  So scary!!  Everything all of a sudden came to a standstill and I could barely type to my friend in google talk to tell her what was going on.  I looked it up on the laptop and found I have to add lines to webshield.ini.  I will if that's the only way I can fix it but shouldn't Avast do an update to fix it?  I wouldn't wanna mess anything up.  Anyway, I love Avast so much....I hope this can be fixed.  It's the first time I've ever had a problem with Avast.  I'm just glad it's not a virus.  I did get it to stop with a cold boot.

As stated in a post above, I also have to run my computer 24/7, so I sure don't want it to burn up while I'm sleeping.

Thanks and p.s. I love Avast's Secure Line (unrelated to this), but just thought I'd put in a good word for it.  Runs great and good vpn connections....not laggy.

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Re: avastsvc.exe 100% CPU
« Reply #9 on: February 25, 2015, 05:52:07 PM »
Hello there

I too, have just encountered this issue.

Fans at full, temp up in the 70's and 94pc process.

This was after a reboot.

Rgds

LoK

Offline Eddy

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Re: avastsvc.exe 100% CPU
« Reply #10 on: February 25, 2015, 06:22:05 PM »
Just a guess, none of you have the latest version installed...
https://forum.avast.com/index.php?topic=166576.0

Ladeedah,
there is no need to change webshield.ini unless someone from avast tells you.
The changes are for old(er) versions.

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  • Guest
Re: avastsvc.exe 100% CPU
« Reply #11 on: February 26, 2015, 02:58:33 PM »
I've been having a load of 99% utilisation over the last few days on my Avast Internet Security so am going to give Eddy's suggestion of loading the beta version from https://forum.avast.com/index.php?topic=166576.0 a try.

thanks eddy

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Re: avastsvc.exe 100% CPU
« Reply #12 on: March 02, 2015, 11:50:04 AM »
I installed the software from Eddys link on 26th Feb and have had no problems since

Offline Eddy

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Re: avastsvc.exe 100% CPU
« Reply #13 on: March 02, 2015, 12:04:06 PM »
There is already a RTM version and the word is that this week or next week a final will be released  ;)

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Re: avastsvc.exe 100% CPU
« Reply #14 on: March 26, 2015, 07:34:01 PM »
I just added the offered update to Avast Premier yesterday, March 25, 2015, and now my CPU is ramping up to 100%.
Thanks, thanks a lot *@#-&^>! <:(