Here are some of the PC computer cleanup software I run:
Auslogics.com: Auslogics disk defrag & Auslogics registry cleaner (both are free)
Paretologic.com: Privacy Controls (not free but I forgot how much $, maybe $20 or $30 annually) this is the only program I know of that gets rid of the web sites you have visited from the registry. When I first ran it, there were over 65,000 web sites listed in my registry. Let me know if you know of another program (especially if it's free).
http://www.ccleaner.us/: CCleaner (formerly "Crap Cleaner") free.
I hope this helps someone. Now back to El Mo. Last time I was there in 1951 or 52 I blew up a HD knucklehead at 135mph.