Ugh, its annoying isnt it? I feel your pain. Last night I spent 2 hours going through everything because of this website I go to sometimes for fansubs. What I usually do is I go through the main folders, like windows, system32, the local folder in my documents and I delete anything modified on the date it all started, and like you said the virus scans, and adaware, and I even tried windows defender. Stupid people, dont they have anything better to do then make these things?

I'm glad you're getting rid of everything though!