I think I have a virus

[AceInfinity]

If you want a review that isn't based off OTL, or HiJackThis logs, I would suggest that you check your Event Viewer for any critical errors or warnings. Check your hard drive for any corrupted sectors or errors. Check the fragmented level (%) on your hard drive as well, and if it's more than 7-10% do a Defrag. Make sure that any unnecessary services aren't running or unnecessary applications that get started from startup.

Also, how about your PC specs?
-Total RAM (virtual/installed)
-CPU

Hope you get your computer back up and running to speed again.