CCleaner - Cleans Up Your Computer
The PC that my wife normally uses became infected with something yesterday, and to make a long story short, I had to clean her PC’s Windows-XP registry. So someone recommended CCleaner, and it worked pretty well. Got my download/installer from FileHippo. Here’s more details:
CCleaner is a freeware system optimization and privacy tool. It removes unused and temporary files from your system - allowing Windows to run faster, more efficiently and giving you more hard disk space. The best part is that it’s fast and free!
Registry cleaner - Advanced features to remove unused and old entries, including File Extensions, ActiveX Controls, ClassIDs, ProgIDs, Uninstallers, Shared DLLs, Fonts, Help Files, Application Paths, Icons, Invalid Shortcuts and more… also comes with a comprehensive backup feature.