Windows Defender Service Not Starting: Fixes and Checks - PowerShell Exchange Online Connection Failure: Troubleshooting Guide-How to Fix a Frozen PowerShell Window

Updated 2026-06-14 18:25:21macos-help
Windows Defender Service Not Starting: Fixes and Checks - PowerShell Exchange Online Connection Failure: Troubleshooting Guide-How to Fix a Frozen PowerShell Window
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.