There should be a hidden recovery partition on the hard drive. If you are still able to run Windows and the recovery partition is intact, here's what you do:
http://techtips.salon.com/restore-s...You are also supposed to make your own set of Recovery Discs (since none are supplied) when the laptop is working okay. This is a safety net in case the hard drive fails and the recovery partition cannot be used. See this:
http://www.kb.sony.com/selfservice/...
