Windows Defender 502 Bad Gateway: Setup and Troubleshooting Guide - Microsoft Teams Installation Stuck at 90%: Fixes That Work-Fix BitLocker Error 0x80310059 on Windows 10/11
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.