This feature takes the OS (Windows XP) back in time to a date/time of your choice when the Computer was working just fine. This is to correct any issues or problems you may be having with the computer.
Although using this feature is at the customers own risk, unlike the past processes/applications that preformed this "GO BACK" type process taking the computer OS (Windows XP) back in time. This Windows "GO BACK" feature has worked really well. So I would recommend using it if the Computer has developed seriuos issues.