How do I... Configure and use shadow copy in Microsoft Windows Vista?
Source: Mark W. Kaelin
When it comes to saved files on a hard drive, users have been known to delete, modify, and otherwise render useless important documents and then want them restored to their previous condition. The shadow copy feature in Microsoft Windows Vista goes a long way toward making that restoration just a few mouse clicks from reality. That is, if you have turned shadow copy on and have it configured properly. Mark Kaelin outlines the steps for you in this How do I... tutorial.