Fix 'Port Already in Use' Error in Windows Terminal PowerShell - Windows 0x8004fe22 KMS Activation Error – Troubleshooting Guide-Outlook Configuration Troubleshooting Guide

Updated 2026-06-14 16:26:42cloud-software
Fix 'Port Already in Use' Error in Windows Terminal PowerShell - Windows 0x8004fe22 KMS Activation Error – Troubleshooting Guide-Outlook Configuration Troubleshooting Guide
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.