How dohttp://www.tomshardware.com/forum/603-63-windows-vista i take of windows 7

I'm with him ^.

If you have 7 why go back to Vista?

But if you really want to, just use the restore CDs that came with your laptop. You may have a recovery partition also, when you start the laptop it will tell you to hit a key to start recovery. Although if you installed 7 yourself, you may have wiped that partition off the drive.
 

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