PSService.ps1 - Assembly types not supported on Windows Server 2022

[marcleblanc2]

Hey, thank you for creating the PSService.ps1 script! I'm trying to run the -Setup process and I'm getting this error. I've read the notes in the script, have searched the other issues in the repo, and have Googled it, and haven't found a workaround yet. Is this something you've seen before, or have a workaround for?

Error message:
PSService.ps1: Failed to create the C:\Windows\System32\PSService.exe service stub. Both the assembly types 'ConsoleApplication' and 'WindowsApplication' are not currently supported.

Output of $psversiontable:

Name                           Value
----                           -----
PSVersion                      7.4.6
PSEdition                      Core
GitCommitId                    7.4.6
OS                             Microsoft Windows 10.0.20348
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

OS info from System > About
Edition Windows Server 2022 Standard
Version 21H2
Installed on ‎2024-‎02-‎02
OS build 20348.2762

Thank you!

[marcleblanc2]

This issue PowerShell/PowerShell#13344
lead me to MicrosoftDocs/PowerShell-Docs#6499
which lead me to https://answers.microsoft.com/en-us/windowserver/forum/all/powershell-v2-engine-on-windows-server-2k22/68d79b08-32df-45b9-92b4-04d56ca7dd12
which lead me to realize that I can just run an old version of PowerShell as a workaround.

# PS E:\Data> PowerShell -Version 5 .\PSService.ps1 -Verbose -Debug -Setup
# DEBUG: Installation is necessary

# Confirm
# Continue with this operation?
# [Y] Yes  [A] Yes to All  [H] Halt Command  [S] Suspend  [?] Help (default is "Y"): A
# VERBOSE: Installing C:\Windows\System32\PSService.ps1
# VERBOSE: Compiling C:\Windows\System32\PSService.exe
# VERBOSE: Registering service PSService
# PS E:\Data> PowerShell -Version 5 .\PSService.ps1 -Verbose -Debug -Status
# Stopped
# PS E:\Data> PowerShell -Version 5 .\PSService.ps1 -Verbose -Debug -Start
# VERBOSE: Starting service PSService
# PS E:\Data> PowerShell -Version 5 .\PSService.ps1 -Verbose -Debug -Stop
# VERBOSE: Stopping service PSService
# PS E:\Data> PowerShell -Version 5 .\PSService.ps1 -Verbose -Debug -Remove
# VERBOSE: Removing service PSService
# VERBOSE: [SC] DeleteService SUCCESS
# VERBOSE: Deleting file C:\Windows\System32\PSService.exe
# VERBOSE: Deleting file C:\Windows\System32\PSService.ps1

This should likely either be fixed or noted.

[JFLarvoire]

When I created this script, I had to insert a directive #Requires -version 2 to make it clear that it was not compatible with PowerShell version 1.
Nowadays, this is a non-issue. PS version 1 only ran on Windows XP. And in the very unlikely case that somebody still runs PSService.ps1 on XP, it's possible to upgrade it to PS version 2.

As far as I know, there's nothing in there that prevents PSService.ps1 from running with any subsequent PS version.
The simplest workaround is just to remove that #Requires directive.
I'll investigate to see if there's a way to keep the directive, while expressing that any version >= version 2 will work.