Add SYSTEM membership check for WSS_WPG group

[Rob3r70]

Updated script to check for SYSTEM membership in WSS_WPG group and added error handling for group membership check.

[Copilot]

Pull request overview

This PR adds an early safety check to the SharePoint SE CU install helper script to detect whether the SYSTEM account (SID S-1-5-18) is a member of the local WSS_WPG group, and reports errors encountered while querying group membership.

Changes:

• Added a Get-LocalGroupMember check for SYSTEM membership in WSS_WPG.
• Added a try/catch around the membership lookup and wrote status/error output accordingly.

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[Copilot]

All other Write-Host status messages in this script appear to be plain ASCII text; introducing emoji characters here may cause garbled output in some consoles/log pipelines and makes output harder to grep/parse consistently. Consider using a text prefix (e.g., "ERROR:" / "OK:") instead of emojis.

Suggested change

	Write-Host "❌ SYSTEM is a member of '$GroupName'" -ForegroundColor Red
	break
	break
	}
	else {
	Write-Host "✅ SYSTEM (S-1-5-18) is not a member of '$GroupName'" -ForegroundColor Green
	}
	}
	catch {
	Write-Host "❌ Error checking group membership: $($_.Exception.Message)" -ForegroundColor Red
	Write-Host "ERROR: SYSTEM is a member of '$GroupName'" -ForegroundColor Red
	break
	break
	}
	else {
	Write-Host "OK: SYSTEM (S-1-5-18) is not a member of '$GroupName'" -ForegroundColor Green
	}
	}
	catch {
	Write-Host "ERROR: Error checking group membership: $($_.Exception.Message)" -ForegroundColor Red

[Copilot]

break is used here at script scope (not inside a loop/switch), which will throw "Cannot break outside of a loop" and prevent the script from running correctly. Use Exit (optionally with a non-zero code) or throw/return to stop execution instead, depending on desired behavior.

Suggested change

	break
	break
	Exit 1