
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...

If you get a 'permission denied' error when trying to open a BitLocker-encrypted drive on a Mac, ...

If you see errors like "Cannot access file" or "File in use" when opening Outlook, your antivirus...

If you're running Outlook on Ubuntu (via Wine or a virtual machine) and encounter error 0x8004010...

You're running Windows Defender and it throws a proxy error—often during an update or a full scan...

You might see a version mismatch warning when opening Windows Defender Security Center or running...