A part of the code is deprecated on windows 8.1, runs but with wrong result

[MatsIBengtsson]

The code $os_version = [System.Environment]::OSVersion.Version uses a deprecated function in windows 8.1. It returns a value, but thw wrong value (identifies as Windows server 2012).

Changing it to $os_version =(Get-CimInstance Win32_OperatingSystem).version gives the right version.

[jborean93]

Thanks, I went a slightly different route as part of #10 but it achieves the same results.