When you install a new hardware, software or update hardware’s drivers on your system chances are that Windows might act strange. Because when you install a new hardware or software it sometimes conflicts with the existing software or hardware present on your computer and then Operating System shows alien behavior which is acceptable to you. In this situation we can use the system restore utility provided in Windows OS. You can think of system restore as the UNDO command for windows Operating System, because when you use this utility windows try to go back to that previous state in time where your computer was fully functional. pangee.