In Vista, it’s a good idea to set a restore point, or go-back-to point, before installing new software or doing maintenance such as editing the registry, which may affect the stability of your PC.
Here’s the absolute fastest way to create a restore point in Vista that I've found:
1. Click start and type in “systempropertiesprotection”
2. If User Access Control is active, click Continue
(Click image to enlarge)