I did that and found it had been turned on again on rebooting, can't be done with messing with this on 3 PC's. After using it from it's initial release as CrapCleaner it's gone.
Dumped Avast long...

Offered Avast on 2 PC's and Chrome on the third, that was using the same installer..... Third PC used to have Avast on it up until 2 years ago.