Read some System Restore FAQs, and troubleshooting steps at Link. I never found system Restore to reliable myself. http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&hs=G1y&q=Frequently+Asked+Questions+Regarding+System+Restore+in+Windows+Vista&btnG=Search
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