
Windows Defender 502 Bad Gateway: Troubleshooting Checklist
If you see a 502 Bad Gateway error when opening Windows Security or trying to update Windows Defe...

If you see a 502 Bad Gateway error when opening Windows Security or trying to update Windows Defe...

You've waited for the update to reach 100%, but it just sits there—not installing, not erroring. ...

If Outlook frequently shows a connection timeout error, especially when trying to send or receive...

When Windows Update fails with a "token expired" error, it often indicates a problem with the com...

You run a Windows Defender scan and it reports that a file is locked and can't be scanned. This i...

You notice Outlook consuming 50% or more CPU, making your syste...