How do I find the install time and date of Windows?

Question

This might sound like a little bit of a crazy question, but how can I find out (hopefully via an API/registry key) the install time and date of Windows?

The best I c

Answer 1

Try this powershell command:

Get-ChildItem -Path HKLM:\System\Setup\Source* | 
 ForEach-Object {Get-ItemProperty -Path Registry::$_} | 
     Select-Object ProductName, ReleaseID, CurrentBuild, @{n="Install Date"; e={([DateTime]'1/1/1970').AddSeconds($_.InstallDate)}} | 
         Sort-Object "Install Date"