Fix PowerShell Service Unavailable on Windows 11 - PowerShell Execution Policy Error Fix-Permission Denied When Flushing DNS in CMD

Updated 2026-06-14 19:21:51windows-fixes
Fix PowerShell Service Unavailable on Windows 11 - PowerShell Execution Policy Error Fix-Permission Denied When Flushing DNS in CMD
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.