Fix Windows Defender Real-Time Protection Authentication Failed - Microsoft Teams 504 Gateway Timeout Troubleshooting-Troubleshoot Chrome Slow Loading Pages
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.
Related Software Guides
Fix Windows Security Connection Refused Service Not Running
Resolving Microsoft Teams Dependency Conflicts
BitLocker Error 0x80310024: Causes and Fixes
Fix Windows Defender Rate Limit Errors After Update
Fix Windows Defender Command Not Found After Update
Fix 'Windows Update Auto Start Service Not Found' Error