Give the two programs in the links below a chance to remove it. You could check the Add/Remove programs for anything that you don't recognize. Google if unsure before removing anything.
Install Super Antispyware. Run it in safe mode. Allow it to quarantine whatever it finds.
http://www.superantispyware.com/
Run the online scan for Bit Defender in normal mode. Allow it to quarantine whatever it finds.
http://www.bitdefender.com/scan8/ie.html
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Post a Hijack This log in the Hijack This Forum by following the directions in the link below if the programs above have not removed ALL malware. DO NOT post the log in this forum.
http://www.bleepingcomputer.com/forums/topic34773.html
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How to Start Windows in Safe Mode:
http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/