
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...

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

You open Microsoft Teams and instead of your chat list, you see a message: "Proxy authentication ...

You open OneDrive and see a 'Connection refused' error. Your files aren't syncing, and the OneDri...

Windows Security (formerly Windows Defender) may fail to open, show a blank page, or refuse to up...

You try to connect to a remote Windows PC via Remote Desktop and get a 'connection refused' or 'c...

You open Windows Terminal, try to start a Remote Desktop session, and get an authentication faile...