System Restore is a feature of Microsoft Windows XP that automatically saves a copy of important system settings and files so that you can easily restore those settings if something goes wrong. System Restore creates a backup copy every day and every time you install new hardware or software.
You should use System Restore only after you have tried other troubleshooting techniques to fix the problem you may be having with a hardware or software program. System Restore simply returns your system to the way it was before you installed the hardware or software—it doesn’t fix your hardware or software problem. Once you’ve restored your system, you’ll have to start the troubleshooting process again with the new software or hardware