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 Microsoft Store Error 0x80073cf0: App Won't Start
When you try to open the Microsoft Store and see error code 0x80073cf0, the app either fails to s...
Windows Activation Failed Due to Blocked Key: Fixes That Work
You see “Windows activation failed due to blocked key” – it usually means the product key you’re ...
How to Fix Microsoft Teams Not Launching
If Microsoft Teams opens briefly then closes, or fails to start at all, the problem is often loca...
Fix 502 Bad Gateway Nginx from Command Line
If you're seeing a 502 Bad Gateway error from Nginx, it usually means Nginx can'...
How to Fix Error 0x80070643 When Windows Update Fails
Error 0x80070643 typically appears during Windows Update when the system cannot complete an updat...
Topic paths
Quick titles
Windows Search Post-Update Troubleshooting GuideTroubleshoot Chrome Error Code 0x80070057Troubleshoot Windows Activation Key Not Recognized ErrorHow to Stop OneDrive from Asking for Password RepeatedlyFix Windows Defender Offline Scan Not StartingResolve Windows Defender Permission Denied Error GuideOutlook 0x800ccc0f Connection Error GuideHow to Fix OneDrive Access Denied Error 0x80070005