Uh oh.. Victim of the AntiVirus 2010 bullshit.
I see you've started scanning malwarebytes' already, go pick up SuperAntiSpyware with that, after malwarebytes' is done, run the other one to make sure you've got everything. (Some scanners pick up things that others don't).
Here's a link to get SuperAntiSpyware : http://www.superantispyware.com/downloadfile.html?productid=SUPERANTISPYWAREFREE
Good luck.