Fix Windows Certificate Error 0x800b0109
When you see error code 0x800b0109 in Windows, it means the operating system cannot verify a digi...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesSSH Permission Denied (Publickey) on EC2: Setup Fixes
If you're seeing "Permission denied (publickey)" when trying to SSH into an AWS EC2 instance, the...
Fix Microsoft Store Module Not Found After Update
After a Windows update, some users see an error like 'Microsoft Store module not found' when tryi...
Fix Microsoft Teams Camera Not Working in Meeting
You join a Teams meeting and your video is black, or you get an error that the camera can't be fo...
Docker Desktop Stuck on Starting: Engine Not Running Fix
You open Docker Desktop and it hangs on 'Docker Desktop is starting...' with a message that the D...
Fix Windows Defender Authentication Error from Corrupted System Files
You open Windows Defender and see an authentication failed error. This often happens after a fail...
Issue queue
SitemapFix 'Port Already Allocated' Error in Windows Defender on Windows 10
Fix PostgreSQL Password Auth Failure: Trust vs md5
How to Stop and Restart Windows Update Service
Troubleshoot WireGuard Handshake Firewall Issues
Fix OBS Black Screen Issue After Update
How to Fix Windows Security Backup Not Working
npm Permission Denied on node_modules: Troubleshooting Guide
Windows Update Cleanup Stuck? Clear the Cache
Cargo Check Fails: Linker Missing Troubleshoot
Windows Activation Error 0xc004f074 Troubleshooting
Windows Security Update Permission Denied: Troubleshooting Guide
How to Resolve Windows Update SSL Certificate Problems
Fix PostgreSQL Password Auth Failure: Trust vs md5
How to Stop and Restart Windows Update Service
Troubleshoot WireGuard Handshake Firewall Issues
Fix OBS Black Screen Issue After Update
How to Fix Windows Security Backup Not Working
npm Permission Denied on node_modules: Troubleshooting Guide
Windows Update Cleanup Stuck? Clear the Cache
Cargo Check Fails: Linker Missing Troubleshoot
Windows Activation Error 0xc004f074 Troubleshooting
Windows Security Update Permission Denied: Troubleshooting Guide
How to Resolve Windows Update SSL Certificate Problems