This could have been done by malware and you'll need to get rid of it if that is the case. First of all you should run a few full scans with some of the woulds best anti-malware tools. These are recommended:
Download, install, UPDATE and run as full scannnings:
Malwarebytes' Anti-Malware: http://www.malwarebytes.org/mbam.php
Also an online scanning:http://www.bitdefender.com/scan8/ie.html
Now check System Restore. Will it work now? If not:
Open SUPERAntiSpyware again. Click the Preferences button. Click the Repair tab. About ½ way down the scroll: mark the Repair broken Windows System Restore Service. Click Perform repair.
Edited by ePost, 10 January 2009 - 04:24 PM.