I have exactly the same problem. I am shown how my PC can be improved but when I click on ‘optimise my pc’ the pc reboots as it would normally. There is no sign of Grimefighter running at all. I have raised a ticket with AVAST and the first response was to tell me to delete the ‘jumpshot.com’ folder in toto and then runa a repair on avast. I followed these instructions and the problem remains exactly the same. Having seen the amount of complaints about this application I am strongly inclined to demand a refund.
I am running windows 8.1
