Fix 'Windows Security Cannot Connect to Microsoft Defender' Error
When you open Windows Security and see the message 'Windows Security cannot connect to Microsoft ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Install Windows Updates on Ubuntu
If you're running Windows software on Ubuntu via a virtual machine or Wine, you may need to insta...
Fix Command Prompt 404 Not Found Error
If you're seeing a '404 Not Found' error in Command Prompt, it usually means the file, command, o...
How to Force a Stuck Windows Update to Complete Installation
You click 'Check for updates' or restart your PC, but Windows Update sits on 'Pending install' fo...
Mac OneDrive Sync Troubleshooting Checklist
OneDrive not syncing on your Mac? Files stuck with a spinning circle or a red X? This checklist c...
Fix Windows Security Service Failing to Start on Startup
If Windows Security (Windows Defender) fails to start when you boot your PC, you may see a warnin...
Topic paths
Quick titles
How to Resolve Windows Activation Error 0x8007007bWindows Activation Error Command Line Repair Not StartingHow to Resolve OneDrive Dependency ConflictHow to Speed Up Windows Search PerformanceHow to Resume Paused Windows IndexingDocker Daemon Not Starting After Reboot on Linux: FixesTeams Sync Issue Due to Dependency ConflictFix Remote Desktop Version Mismatch Between Client and Server