Avast updated itself to Version 9.2011 so I didn't see anything to tick or untick. I'm using the free Version and I thought Grime Fighter came with a paid Version.
@abruptum,
I've already done this 3 times and I saw nothing about Grime Fighter.
@abruptum
I done exactly what you told me to do and it showed nothing about Grime Fighter. Did not show anything to tick or untick. Rebooted and nothing changed.