If you install and uninstall programs as often as I do you've probably run across one that doesn't completely uninstall or worse yet won't. There haven't been a lot of options to rectify that situation unless you have picked up a copy of Microsoft's Windows Installer Cleanup Utility. Its been around in the present version since August of 2004 but many haven't even heard of it. Go get it now from here.

I found a reminder of this utility over on Serge van den Oever's blog.