Very geeky posting
So if your computer is slowing down and you can not be bothered to reinstall it (or don’t know how to…) then this software might be useful. It will run through your windows backend systems and clean it up. (hopefully resulting in a faster solution..)
http://www.lexundesigns.com/LexunFreeware/UsersGuides/RegScrubXP%20User's%20Guide.htm