Author Topic: Avast using 100% CPU  (Read 4809 times)

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Avast using 100% CPU
« on: February 18, 2015, 02:04:40 AM »
I have no idea what is going on but every once in awhile avast uses 100% of my cpu out of nowhere. I have to restart to get it to stop.... Anyone know how to fix this? Is it a bug with Avast or am I getting hacked or something? I have had avast for a few years and never had this problem.... Also, when I shut down my computer it says Welcome To Avast as I turn it off???? Very strange... I tried scanning for malware with malware bites and nothing comes up... and I obviously scanned for viruses with avast premium and still nothing....

Anyone know what could cause this?

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Re: Avast using 100% CPU
« Reply #1 on: February 18, 2015, 02:13:27 AM »
I should also mention that I did in fact reinstall Avast to see if that would fix it... It seemed like it did for a few days and then it did the 100% cpu usage again.

Offline Rednose

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Re: Avast using 100% CPU
« Reply #2 on: February 18, 2015, 02:33:35 AM »
Hi Aaron2, welcome to the forum :)

What other security software do you have installed ?

We are also testing a new Beta version that fixes a lot of problems https://forum.avast.com/index.php?topic=166172.0

If you want to have your system checked for malware, follow this turtorial https://forum.avast.com/index.php?topic=53253.0
Than start a new topc here https://forum.avast.com/index.php?board=4.0 and attach the logs.
As soon as a specialist is online and available he/she will help you.

Greetz, Red
OS: Win 10 / iOS 16 / Debian 11 / Tails 5
Real Time: Avast Premium Security
On Demand: Malwarebytes
VPN: NordVPN ( NordLynx ) with Threat Protection ( Lite )

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Re: Avast using 100% CPU
« Reply #3 on: February 18, 2015, 04:09:37 AM »
Problem with avast... multiple postsin the last 24 hours.

Offline Eddy

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Re: Avast using 100% CPU
« Reply #4 on: February 18, 2015, 04:18:43 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.

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Re: Avast using 100% CPU
« Reply #5 on: February 18, 2015, 09:20:32 PM »
I have not had the issue today, but if it does it again i am just going to uninstall it and ask for a refund. I paid like 100 bucks for this and it has a bug that makes my cpu use 100%? That is scary. Also, if I have to uninstall my anti virus I will not be protected.... that is also scary.

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Re: Avast using 100% CPU
« Reply #6 on: February 18, 2015, 09:48:42 PM »
I have the same problem. Process AvastSvc.exe 100 pourcent ... I restart my PC ... It's ok yet.

I have no virus or malware, troyen etc ...


Offline Eddy

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Re: Avast using 100% CPU
« Reply #7 on: February 18, 2015, 10:17:08 PM »
Aaron, it can very well be that avast is using that many resources because it is scanning something on your system.

What os/sp ?
What exact version of avast ?
Is a particular shield causing it ?

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Re: Avast using 100% CPU
« Reply #8 on: February 18, 2015, 10:59:42 PM »
 W7 64 bits prenium
Avast 2015.10.0.2208
Is a particular shield causing it ? : No

« Last Edit: February 19, 2015, 02:31:26 AM by tenseur »

Offline Eddy

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Re: Avast using 100% CPU
« Reply #9 on: February 18, 2015, 11:14:35 PM »
https://forum.avast.com/index.php?topic=166172.0
Perform a clean installation of the latest one and see if it solves the problem.