Enable or disable System Restore in Windows 7
How do you enable or disable System Restore in Windows 7?
System Restore helps you restore the files on your computer to an earlier point in time and it is generally a good idea to have it enabled. However, if you really need that extra space on your hard drive you might want to disable it.
This is how you access System Restore in Windows 7:
Click the Start button -> Control Panel -> System and Security -> System and then click System Protection in the left pane.

Click the System Restore button to restore your system to previous state, click the Create button to create a System Restore point, or click the Configure button to change some of the System Protection options.