: Ensure the app is set to "Install as system" but your script uses ServiceUI.exe to display any necessary prompts to the logged-in user. 2. Validate PSADT Configuration
If your packaging tool or deployment script attempts to call modules or functions that rely on user profiles, running the script under the local NT AUTHORITY\SYSTEM context will result in a crash, as the SYSTEM account lacks a standard user profile path ( $env:USERPROFILE ). Actionable Solutions: How to Resolve 0x8007ea61 0x8007ea61 better