How to Allow an App Through Windows Defender Firewall
If an app can't connect to the internet or network, Windows Defender Firewall may be blocking it....
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Defender DNS Error 0x800704cf
You open Windows Defender and see error code 0x800704cf. This usually means Windows Defender can’...
Fix Windows Activation Error After Hardware Change
If you've recently replaced your motherboard, CPU, or other major hardware, you may see a Windows...
Microsoft Store Download Stuck on Mac: Fixes That Work
If you're seeing a download in the Microsoft Store stuck at 0% or a partial percentage on your Ma...
Fix Windows Update Token Expired Registry Error
If you see a 'token expired' or 'Token Expired' error when checking for Windows updates, the issu...
Fix Windows Defender Path Not Found Error 0x80070643
When you try to update or run Windows Defender, you might see error 0x80070643 with a message lik...
Topic paths
Quick titles
BitLocker Encryption Port Conflict: How to Identify and FixOneDrive Sync Settings Won't Save After ResetWindows Security Connection Refused: Quick ChecklistCommand Prompt Disabled in Safe Mode? Try These StepsBitLocker SSD Performance: Configuration TipsHow to Resolve Outlook Startup Configuration FailureResolve BitLocker Backup Error 0x80070057Fix Microsoft Store Network Error on Windows 10