Fix 'Windows Defender Firewall Has Blocked' Error
You see a notification that Windows Defender Firewall has blocked an app or feature. This usually...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listWindows Security 404 Error: Practical Troubleshooting Checklist
You open Windows Security and get a 404 error instead of the dashboard. This usually means the Se...
Task Scheduler Auto Start Not Working with Logon Trigger
You set up a Task Scheduler task to run automatically when any user logs on, but it doesn't start...
Fix 'nvm not found' After Adding to Environment Variables
You've added nvm to your environment variables, restarted the terminal, but running nvm
Fix Microsoft Teams Installation Error on Mac
You try to install Microsoft Teams on your Mac, but the installer fails partway through or throws...
Windows Task Scheduler Service Not Starting: Fixes
If the Task Scheduler service won't start, scheduled tasks won't run and you'll likely see an err...
Topic paths
Quick titles
Verify Port Allocation Using netstat and findstrHow to Resolve 'Command Not Found' in PowerShellStop Windows Security from Using All Your MemoryTroubleshoot Microsoft Store Not StartingWindows Security Access Denied After Update FixResolve Port Allocated Error for Windows SearchHow to Fix PowerShell Service Unavailable on Windows 11Azure Function 504 Timeout Fix for PowerShell Scripts