When was my computer born?

If you want to find out when your Windows computer was “born”, open a “DOS” (Disc Operating System) box by typing cmd in the start/Run field or in Windows 7 at the start search field. A black box will appear and next to the flashing cursor, type the below text exactly and press the Enter key:
systeminfo|find /i “install date”
Type exit and press the Enter key to close the DOS box.