Make Sure System Restore is On

System restore allows you to “go back in time” to recover from a change that damages your Windows system. It takes “snapshots” of the Windows system at various time points, and holds them. You can basically “roll Windows back” to a previous time to get rid of any change that caused the problem.
From the Windows desktop, hold down the Windows key and press the Pause/Break key. This will open Windows System Properties. Click the System Restore tab. Uncheck the Disable System Restore box if it is checked.
Note: If you are using Windows Vista, System Restore is turned on by default.