I think one of the first steps you should do is download SuperAntiSpyware Portable and run it as it ALONE solves most of the problems I've ever encountered, then Malware antibytes. PM me if you can' get to the official site and I'll mirror it.
http://www.superantispyware.com/portablescanner.html
http://www.superantispyware.com/portablescanner.html