Did you know that when enabled, select versions of Microsoft Vista store previous copies of your files and folders? This means that you can get them back if you need them.

To view the previous versions of a folder open Windows Explorer, navigate to the folder, right click on the folder and select Properties. Then select the Previous Versions tab e.g. Link.

To view previous versions of a File just right click on the file and select "Restore previous versions".

If you have time check out this video: Link.