System Restore can restore Windows hardware and software settings to a previous state. This will not affect personal data and documents such as emails, documents or photos. Windows XP, Vista and 7 automatically copy critical system settings, configuration details and hardware settings. Copies, called restore points, can also be created manually.

You can use system restore to restore system files and settings to their previous working state. Please follow the steps below according to your operating system:

Windows XP:

　1. Click Start, then All Programs, Accessories, and System Tools , and then system restore.

2. Select Restore my computer to an earlier time and click Next.

3. In the displayed calendar, the date displayed in bold indicates that a restore point has been created. Select a date when the system is known to be functional or an earlier date, and click Next.

4. A confirmation prompt will pop up. Click Next to start the recovery. During the recovery process, the system will automatically restart.

Windows Vista or Windows 7:

1. Click Start, Next All Programs, Accessories, System Tools, and then select System Restore.

2. The system will display the recently created restore point as the recommended restore point. If you are sure that the system was running normally on this date, click Next; otherwise, choose Choose another restore point. A list of available restore points organized by date is displayed. Select a date when you are sure the system is still functioning properly and click Next.

3. A confirmation prompt will pop up. Click Next to start the recovery. During the recovery process, the system will automatically restart.