try these free downloads after you do a windows repair to see what may come up and then wipe anything that moves.

superantispyware.com.
"start superantispyware when windows starts","use windows XP style menus",and inth Vista security center" if you are running Vista. also select "do not scan when superantispyware starts" and "check for updates before starting on startup".do a complete scan and kill anything that it finds.

malwarebytes anti-malware(malwarebytes.org)
install,run update,and run a complete system scan.kill whatever it finds.

panda activescan 2.0(pandasecurity.com/activescan/index)
just an added extra feature that you may want to run in addition to the rest of these.

good luck!!!