Go to Start > Run > and enter “CMD /K WMIC OS GET InstallDate” then press Enter.
New window will open with contents similar to this:
InstallDate 20090727165439.000000+120
Go to Start > Run > and enter “CMD /K WMIC OS GET InstallDate” then press Enter.
New window will open with contents similar to this:
InstallDate 20090727165439.000000+120