Fawk, my friend was using my comp and went around some dumb sites and now I have a fawkin "security toolbar" that I can't get rid of, my home page is not my home page anymore and I can't set it back, comp is sluggish and has tons of pop ups

. I already did a ad-aware scan, removed a whole bunch of shit, and now running symanted antivirus... it already found like 15 byteverifi trojans... What can I do?