Combofix, bleepingcomputer.com (If you have a 32bit OS)
MBAM, get it at download.com
Spybot
Run them in safe mode with networking and you should be able to get rid of it. Use a program like CCleaner to get rid of all of the excess files, also found at Download.Com
After you are done with that, run a regular scan with your Antivirus and clean up anything left.