OSversion returned to script incorrectly about mdefordownlevelserver

[NeverHere]

Updating to WSM 5.1 seems to resolve this issue, it might be worth adding that as a step to the documentation.

[James3UK]

Deploying this script with ManageEngine returns "Unsupported OS version: 0.0.0.0" I think this is because it runs under a local system service it appears fine when run manually.

Two ways to fix this, both reliant on the "UBR" registry value for the revision so option 1 is probably better (get it all from the registry):

EDIT: Turns out I needed option 2 as Option 1 did not work on some 2012 R2 servers due to CurrentMajorVersionNumber returning 0

Option 1:

$osRegkeys = Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion'
$osVerObj = New-Object System.Version $($osRegkeys.CurrentMajorVersionNumber), $($osRegkeys.CurrentMinorVersionNumber), $($osRegkeys.CurrentBuild), $($osRegkeys.UBR)

Option 2:

$osRegkeys = Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion'
$osVerWMI = (Get-CimInstance Win32_OperatingSystem).version.split('.')
$osVerObj = New-Object System.Version $($osVerWMI[0]), $($osVerWMI[1]), $($osVerWMI[2]), $($osRegkeys.UBR)

[pahuijbr]

Should be resolved