Massive CPU usage by Avast service

[jfday]

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?

[Asyn]

- 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..?

[jfday]

- Which Avast..? (Free/Pro/IS/Premium)
Free
- Which version/build of Avast..?
I am unable to find a version number for Avast, but it updated yesterday.
- OS..? (32/64 Bit..? - which SP/Build..?)
Windows 10 Home build 19041.388
- Other security related software installed..?
I have Malwarebytes installed, but I do not run it actively, I just use it to scan if I run into an issue.  Neither it nor Avast found anything today.
- Which AV(s) did you use before Avast..?
I installed Avast when I got the computer, no other AV programs have run on it.

[Asyn]

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/

[jfday]

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

[Asyn]

You're welcome.