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System Restore makes no changes to your personal data files such as documents, drawings, or e-mail. It actively monitors changes to your system and to certain application files, and automatically creates easily identifiable restore points. Windows XP creates these restore points once each day by default, as well as at the time of significant system events such as application or device driver installation. You can also create and name your own restore points at any time. System Restore does not monitor changes to or recover your personal data files.