RunAsLoggedOnUserContext.ps1 returning error.

[MaxPresi]

When I try to use the script, it returns the error below.

Script is not running as SYSTEM. This script is designed to run in the SYSTEM context. No C:\WINDOWS\Action1\scripts\Run_Script_82d13990-5752-11f0-ba8c-c30a9a7fe6e4_Script.ps1:425 caractere:9 + throw "Script is not running as SYSTEM. This script is design ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : OperationStopped: (Script is not r...SYSTEM context.:String) [], RuntimeException + FullyQualifiedErrorId : Script is not running as SYSTEM. This script is designed to run in the SYSTEM context.

I'm running it as a script, not as software (running the .ps1 file).

If I comment out this part, except for the verification that it's running via the System user, the script works, but it doesn't run the command (between the @' '@) with administrative permissions.

Does anyone know what it can be?

[calvarium]

The issue happens because NT AUTHORITY\SYSTEM is localized in different languages (e.g. German: NT-AUTORITÄT\SYSTEM), so comparing the name fails on non-English systems.

PR #6 fixes this by checking the SID S-1-5-18 instead of the name, making the detection language-independent:

$isSystem = [System.Security.Principal.WindowsIdentity]::GetCurrent().User.Value -eq 'S-1-5-18'
if (-not $isSystem) {
    throw "current user is: $currentUser Script is not running as SYSTEM. This script is designed to run in the SYSTEM context."
}
    

This ensures the check works on all Windows languages and improves the error message with current user info.

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✅ To fix it now: use the version from PR #6 or apply the snippet above, and make sure the script is running in the SYSTEM context.