Avast WEBforum

Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: REDACTED on February 18, 2015, 02:04:40 AM

Title: Avast using 100% CPU
Post by: REDACTED 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?

Title: Re: Avast using 100% CPU
Post by: REDACTED 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.

Title: Re: Avast using 100% CPU
Post by: Rednose 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

Title: Re: Avast using 100% CPU
Post by: REDACTED on February 18, 2015, 04:09:37 AM

Problem with avast... multiple postsin the last 24 hours.

Title: Re: Avast using 100% CPU
Post by: Eddy 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.

Title: Re: Avast using 100% CPU
Post by: REDACTED 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.

Title: Re: Avast using 100% CPU
Post by: REDACTED 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 ...

Title: Re: Avast using 100% CPU
Post by: Eddy 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 ?

Title: Re: Avast using 100% CPU
Post by: REDACTED on February 18, 2015, 10:59:42 PM

 W7 64 bits prenium
Avast 2015.10.0.2208
Is a particular shield causing it ? : No

Title: Re: Avast using 100% CPU
Post by: Eddy 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.