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To restore using Microsoft System Restore:
1Click 
(Start), Control Panel, System and Maintenance, then click Backup and Restore Center. The Backup and Restore Center opens.
2On the left side of the window, click Repair Windows using System Restore, then click Next. The Choose a restore point dialog box opens.
3Click the restore point you want, click Next, then click Finish. A confirmation message box appears.
4Click Yes. Your system is restored using the restore point you specified. This process may take several minutes, and may restart your computer.
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