Hello. The message you get indicates a fault in your hard drive or controller - I would assume it is the hard drive itself. You could try booting from your XP installation CD and then choose the Repair Console to see if you can access the drive at all, but I would expect that you cannot.
Restoring to a previous date is a feature of Windows, and since you can't even boot your drive that is not a useful option for you - it does not fix this type of problem.
You are very likely to need a new hard drive and a reinstallation of Windows.
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Dave
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