Fix Windows Defender Connection Refused After Update - Troubleshoot Dependency Conflict Error 0x80070002-Microsoft Teams Access Denied: IT Admin Checklist

Updated 2026-06-14 15:24:56security-tools
Fix Windows Defender Connection Refused After Update - Troubleshoot Dependency Conflict Error 0x80070002-Microsoft Teams Access Denied: IT Admin Checklist
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.