RegSnap

RegSnap is a comprehensive application designed to maintain perfect control over your system registry, comparing any modification, no matter how small.

The program lets you create as many backups of your registry files as you want, which you can later use to recover a previous configuration without too much hassle.

Additionally, RegSnap generates a series of extensive, detailed HTML reports of all the actions carried out.

RegSnap is a very useful tool that you should use with caution, as despite making it easy to fiddle around with the system registry, it's something you should only mess with if you know what you're doing.