info omkring systemrestore
Q.Does System Restore protect personal data files?
A.System Restore does not monitor changes to or recover personal data files such as Word documents, graphics, e-mail, etc.
Q.What files are monitored by System Restore?
A.System Restore monitors only a core set of specified system and application file types (e.g. .exe, .dll etc), archiving the states of these files before system changes are made. System Restore does not monitor any user/personal data files. To view the included files specified in System Restore, see Monitored File Extensions in the System Restore section of the Platform SDK. Modifications to this list from sources other than Microsoft are not supported.
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http://www.microsoft.com/technet/prodtechnol/winxppro/plan/faqsrwxp.mspx