Public/Windows/Convert-WindowsGUIDToPID.ps1
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Function Convert-WindowsGUIDToPID { # Converts a GUID to a Product ID # https://adameyob.com/scripts/converting-guid-pid/ [CmdletBinding()] param( [Parameter(Mandatory,ValueFromPipeline,Position=0)] [GUID] $GUID ) process { #Stripping off the brackets and the dashes from the GUID, leaving only alphanumerical chars. $ProductIDChars = [regex]::replace($GUID, "[^a-zA-Z0-9]", "") #1. Reversing the first 8 characters, next 4, next 4. Then for the latter half, reverse every two char. $RearrangedCharIndex = 7, 6, 5, 4, 3, 2, 1, 0, 11, 10, 9, 8, 15, 14, 13, 12, 17, 16, 19, 18, 21, 20, 23, 22, 25, 24, 27, 26, 29, 28, 31, 30 Return -join ($RearrangedCharIndex | ForEach-Object { $ProductIDChars[$_] }) } } |