Fix High CPU Usage by MsMpEng.exe (Windows Defender) - Why GitHub Actions Shows Canceled Manually-Remote Desktop Failed to Start 0x204

Updated 2026-06-14 20:53:15backup-recovery
Fix High CPU Usage by MsMpEng.exe (Windows Defender) - Why GitHub Actions Shows Canceled Manually-Remote Desktop Failed to Start 0x204
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.