Try going to MSconfig, and disabling it at bootup.
Be careful though. Changes made here could affect the boot up completly, and stop it starting, yet, if you be careful and don't mess with anything you don't know about, you should be fine.
I also love this program:
Its very good at cleaning your registry, and is free. I downloaded it today and used it, and its cleared up alot with no problems.
Reviews I read before hand said it was one of the best, that affected registry without leaving bad marks behind.
It can clean registry not used/clean removed programs items that won't fully remove/remove temp files, etc, etc.