99% CPU usage (avast free vers.)

Avast Free Antivirus / Premium Security
1

“web shield” randomly causes high cpu usage . how can i solve this problem? thanks.

usually steam and chrome run on desktop also nvidia gforce experience, lenovo energy menagement, dobly home theater, COMODO firewall, creative volume panel,iobit startmenu8 run in the background. (metro apps uninstalled/disabled)

avast settings;
only file system, web and mail shields enabled.(no avast addon/toolbar installed on chrome and other avast tools are disabled)

comodo firewall settings;
firawall enabled, auto-sanbox disabled

there is no avast - comodo conflict. they are added as exception to eachother. (Disabling comodo firewall did not solve the problem)

my notebook specs
windows 8.1
intel i5 @ 2.6 - 3.2 ghz
GeForce GT 640m + intel hd 4000
6gb ram

2

First try a repair of avast.
Control panel > software > avast > add/remove > repair

If that doesn’t solve it:

  1. Download Avastclear, Rejzors uninstall tool and the appropriate Avast program edition.
    Here are the installer links. Note: You need to be ONLINE during this install.
    http://files.avast.com/iavs9x/avast_free_antivirus_setup_online.exe
    http://files.avast.com/iavs9x/avast_pro_antivirus_setup_online.exe
    http://files.avast.com/iavs9x/avast_internet_security_setup_online.exe
    http://files.avast.com/iavs9x/avast_premier_antivirus_setup_online.exe

Avastclear : http://files.avast.com/iavs9x/avastclear.exe
Rejzors Uninstall tool: http://rejzor.wordpress.com/avast-cleanup-tool/

  1. Uninstall Avast by control panel [If you don’t have Avast in control Panel go to #4]
  2. Uninstall in Safe Mode using Avastclear.
    http://www.avast.com/uninstall-utility
  3. Run Rejzors Uninstall Utility in Normal Mode (removes traces avastclear doesn’t) - reboot.
    http://rejzor.wordpress.com/avast-cleanup-tool/
  4. Be Sure Too Check Once Uninstall is Complete:Device Manager>View>Show Hidden Devices
    If there is anything related to Avast with a yellow triangle then uninstall it (highlight, right click) and reboot.
  5. Install the version you downloaded.
  6. Reboot.

Also, here is the download links to the offline installers but in some cases the offline installer doesn’t work, whereas the online one does.
It has something to do with the wrong SFX in some installers…I’ve read several posts on issue with VISTA with the offline.

http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_pro_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_internet_security_setup.exe
http://files.avast.com/iavs9x/avast_premier_antivirus_setup.exe

3

repairing did not work. gonna try the other solution…