Massive CPU usage by Avast service

Has anyone else been having problems with Avast service consuming ridiculous resources? It’s been inconsistent, but has been regularly spiking above 90% CPU usage, and is usually staying above 40-50%. I cannot stop the service and don’t really want to uninstall Avast if I can avoid it. Any suggestions?

  • Which Avast…? (Free/Pro/IS/Premium)
  • Which version/build of Avast…?
  • OS…? (32/64 Bit…? - which SP/Build…?)
  • Other security related software installed…?
  • Which AV(s) did you use before Avast…?
  1. Download Avast Free Antivirus: https://files.avast.com/iavs9x/avast_free_antivirus_setup_offline.exe
  2. Follow instructions: https://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.

PS: Regarding Avast & Malwarebytes, see: https://forums.malwarebytes.com/topic/200324-exclusions-for-avast-users/

The reinstall appears to have done the trick, thank you very much, particularly for the tip on using the uninstall tool from Avast.

You’re welcome.