system
3
http://www.download.com/3000-2086_4-10242244.html
StartupMechanic has some false possitives on what it flags as malware, but the path given is correct, so you can easily decide what to keep or not. Overall, very-very easy to use!
To avoid start-up items registering themselves again, use Spybot’s “TeaTimer” which gives you a warning every time something like this happens, and the choice to keep it or not.