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...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Microsoft Store File Locked Setup Blocked Error
When installing or updating apps from the Microsoft Store, you might see an error saying the setu...
Fix BitLocker Connection Refused Configuration Error
You're setting up BitLocker, and suddenly you see a 'Connection refused' error when trying to con...
Fix Windows Search Indexing Turned Off Error
If you search for a file or email and get no results, or the search box says "Indexing is turned ...
Fix Cloudflare SSL Errors After Switching to Full Strict
If you recently changed your Cloudflare SSL/TLS encryption mode to Full (Strict) and now see SSL ...
Fix Windows Activation Cannot Connect to Activation Server via CMD
When Windows fails to activate and displays "Cannot connect to activation server," it's usually a...
Topic paths
Quick titles
How to Check Chrome Browser Version CompatibilityTroubleshooting MongoDB Compass localhost:27017 ConnectionFix Windows Search 502 Bad Gateway After UpdateHow to Resolve Task Scheduler Version Mismatch in Windows 10How to Resolve PowerShell Command Not Found After UpdateWindows Defender Firewall Configuration GuideFix Putty Connection Refused on Port 22Fix Chrome ERR_TUNNEL_CONNECTION_FAILED Caused by Antivirus