Trick to Know the Date of Installation of the Windows.

Sometimes we may need the Date of Installation of our Windows. We may want to know how Old is our Operating System or any other Information related to our System. Windows does not provide Direct Information about the Installation Date of our Windows.
However we can View the Date of Installation of our Windows from Command Prompt easily by the following Commands :

1) Start  >>  Run  >>  cmd.
2) Now type "Systeminfo" ( without quotes ).
3) Press Enter and the Result will Displayed below the Input.
Not only the Installtion Date but also we can View the BIOS version of our System, Computer Model Name, Product Code, Time and Date of System Startup, etc.
So this is a simple Trick to Know the Date of Installation of the Windows.