avastsvc.exe high CPU usage

Avast Free Antivirus / Premium Security
21
  1. Download avast! Free Antivirus: http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
  2. Follow instructions: http://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.
22

I have tried that several times with no luck.

23

I really need to talk to avast developers.

24

Add the two lines in your WebShield.ini

[General]
UseStreamFilter=0

25

And where can I find webshield.ini?

26

C:\ProgramData\AVAST Software\Avast\WebShield.ini

27

Hello everyone,

I just tried this solution and it worked for me.

I am running Windows XP and my webShield.ini is at:
C:\Documents and Settings\All Users\Application Data\AVAST Software\Avast

I disable Avast Until Reboot, edited the file, and restarted. Avast’s CPU usage is at zero and it’s still happy.

Thank you for the help!

28

Edited what ??? What changes did you make???

29

See Asyn’s post “23” for the changes Bob.

30

Thanks, I missed that.

31

NP’s :slight_smile:

32

You’re welcome.

33

You guys rock. I know this is an old thread but, I had to say thank you.

Anyone knows if this edit will survive future updates? …or will I have to edit the webshield.ini after each update?

34

It should survive the update, if it is an update in-place and the update done from the avastUI. It should also be OK if you do an install over the top of your existing avast version.

The doubt would be if you did a clean reinstall, if the webshield.ini was replaced.

35

Hey guys, I’ve been trying to update the WebShield by adding “[General] UseStreamFilter=0”. I disable avast for 10 minutes, add the 2 lines to the webshield, save the document, an avast popup asks if I want to make the change, I click yes, I (try) to save the document, then I get another popup that says “access denied”. I’m logged in as admin, running windows 8 on a Surface Pro 3. Any ideas?

36

Disabling avast for 10 minutes won’t cut it as that is disabling only the scanning protection, but it won’t stop the avast Self Defence module from protecting avast itself.

AvastUI > Settings > Troubleshooting and disable the avast Self Defence module. Now you can run notepad as admin, open the avast WebShield.ini file and do the edit.

37

That worked! Thanks!

38

You’re welcome.

39

Just for curiosity, what exactly does the option “UseStreamFilter=0” do? I suppose it disables the Stream Filter, but what is this Stream Filter and how does it affect the web navigation?

I have the same CPU problem while watching online videos. After adding this option, the CPU is always at 100%, but the videos seem less laggy.

40

It reverts to the old method of streaming the data being scanned as it is downloaded. I don’t believe it makes any difference to actual web navigation.

Two things which you don’t mention: ?

  1. your OS as the “UseStreamFilter=0” isn’t supported on XP or Vista as you would still be using the old method.
  2. what version of avast 2015.10.2.2215 being the latest.