Timestamp – Determine when Windows was installed on a computer

Is it possible to check the date when Windows was installed on a PC and if so how?

Solution:

Using the command-line, you have a tool called WMIC, that can be used to ascertain the installation date as follows:

CMD /K WMIC OS GET InstallDate

^{You can run this within the command-line or directly from the windows “run”.}

Ps: AFAIK, you can use this since Windows XP.

You can easly read the above output adding the relevant markup: 2011-02-14 13:36:58