You must be logged on to the system as an Administator.
Click Start, select All Programs, select Accessories, select System Tools, then select System Restore.
Make sure "Restore my computer to an earlier time" is selected.
In the "Select a Restore Point" window, the current date is selected on the calendar. Select this date or any other earlier date that is bold. It is usually advisable to select the nearest date and work backwards if needed.
If multiple restore points are shown in the restore point list, select one to use.
In the "Confirm Restore Point Selection" window, click Next. Restoration will begin and the computer will restart when completed.
The "System Restore Restoration Complete" page will appear after the system reboots.