In this video from MegaByteTV we learn how to find your operating system's original install date and time. This is for XP Pro only. To find it, go to the Start menu, then click Run. Once there, type in cmd and click OK. A black box will come up showing that you are in cmd. Then paste the following into the cmd box: systeminfo | find /i "install date" The original install date will then come up on your screen along with the original install time as well on that date. This is a very simple process which can be done by following those instructions.