Fix Windows Defender Firewall Blocking Internet Connection
If your internet stops working after a Windows update or firewall configuration change, Windows D...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Windows Defender Connection Refused Error
If you see a 'connection refused' message when opening Windows Defender or updating virus definit...
Fix 'Windows Defender Command Not Found Access Denied'
You type MpCmdRun.exe -Scan -ScanType 2 or another Defender command in Command Promp...
Fix Missing Task Scheduler Command Line Tool
If you see an error that the task scheduler command line tool is missing when running schta...
Fix Windows Security Invalid Configuration Error
You open Windows Security and see an error: "Invalid configuration" or "Your IT administrator has...
Fix 'microsoft teams command not found' on Linux
You open a terminal, type microsoft teams or teams, and get comma...
Topic paths
Quick titles
Fix 'Windows Update Auto Start Service Not Found' ErrorMicrosoft Teams Setup Error GuideHow to Reinstall the Windows Security App (Microsoft Defender)Error 0x80070422: Windows Security Service Not Starting FixWindows Activation slui.exe Won't Launch? Try These FixesFix Command Prompt Auto Start Not Working After UpdateWindows Command Prompt Backup to External Drive GuideSetup OneDrive to Ignore SSL Certificate Errors