System Restore is a feature in window operating system that is really helpful whenever you are a victim of window crash or any kind of virus that stop the normal functioning of your computer.Sometime installing a incompatible program or driver cause such problems which are needed to throw out.System Restore recovers your data from virus or catastrophic crash.System can be restored to various system restoring points.It doesn't cause any kind of harm to your data ,it only removes the suspicious program or driver that has cause problems to your computer.