Fix Windows Security Offline Installer Error 0x80070643 - Fix Microsoft Teams Service Unavailable on Windows 10-Fix Audio Sync with FFmpeg Delay Command
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.