Do you know anywhere that I can download a free registry cleaner that works?

The only reg cleaner I trust is the one from TuneUp Utilities. I have used it on my computer and others for years and never had anything damaged. Try it from http://www.tune-up.com
It is 30 days free, plenty of time to clean.

If you want to clean your files, use C-Cleaner http://www.ccleaner.com
I do NOT recommend it for registry though, it messed mine up but does allow backups before ruining it...