Fix Windows Certificate Error 0x800b0109
When you see error code 0x800b0109 in Windows, it means the operating system cannot verify a digi...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'err tunnel connection failed' on Chrome for Android
You open Chrome on your Android phone and instead of loading a page, you see 'err tunnel connecti...
How to Fix Connection Refused in Windows Terminal
You open Windows Terminal, try to connect to a remote server via SSH or launch a local service, a...
Fix Microsoft Store App Version Mismatch Errors
You open a Microsoft Store app and get an error about a version mismatch, or the app won't start ...
Fix Teams Loading Forever on Windows 10
If Microsoft Teams gets stuck on the loading screen with a spinning circle or a blank window, you...
How to View Windows Defender Logs in Event Viewer
If you suspect Windows Defender missed a threat or want to review past detections, the logs are s...
Topic paths
Quick titles
Blank Windows Search Screen TroubleshootingPowerShell Token Expired: Why CMD Works FineMicrosoft Store Not Opening After Windows Update: FixWindows 10: Microsoft Store Offline Installer Fails to InstallFix BitLocker Sync Issues with Active DirectoryBitLocker Permission Denied After Password Change: How to FixWindows Defender DNS Configuration Fix GuideHow to Fix Windows Security Issues on a Mac