
Fix 'Port Already Allocated' Error in Windows Defender on Windows 10
You may see an error like "Windows Defender Firewall cannot use port X because it is already allo...
Software troubleshooting desk

You may see an error like "Windows Defender Firewall cannot use port X because it is already allo...

You open Windows Defender Security Center or try to run a scan, and you see an error saying a por...

If Windows Defender shows an error saying it cannot connect to Windows Update, it usually means t...

If you're using Cloudflare's Flexible SSL and seeing a redirect loop or 'permission denied' in yo...

You click an extension icon, but nothing happens. Or the popup shows a loading spinner that never...

If you're trying to download or sync a Chrome profile on your Mac and it's not working, you might...