
Fix 'Port Already in Use' Error with Windows Defender Firewall
You try to start a local service or application, and it fails with an error like 'port already in...
Software troubleshooting desk

You try to start a local service or application, and it fails with an error like 'port already in...

When Outlook shows a 'permission denied' error, it usually means the application cannot access a ...

When Chrome displays an error like ERR_UNSAFE_PORT or a message that a port is alrea...

Windows Defender’s real-time protection sometimes gets stuck—either refusing to turn on after bei...

You may see an error like “Invalid configuration” when opening Windows Defender or trying to run ...

When developing apps for the Microsoft Store, you may encounter situations where apps fail to ins...