http://www.r@ymond.cc/blog/how-to-ed...ng-in-windows/ (replace @ with a, it's censored here for whatever reason)
That should take care of any registry entries. I wouldn't recommend the "clean" registry route, because that can easily create more problems than solve.
Lastly, next time take a look into this:
http://www.techsupportalert.com/best...g-software.htm