Fix Windows Defender Service Not Starting (Error 0x80070422)
You try to start Windows Defender but get error 0x80070422: “The service cannot be started, eithe...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Enable Windows Defender in Windows 10
If you're seeing a warning that Windows Defender is turned off, or you can't access its settings,...
Fix 'Windows Defender File Locked Cannot Access' Error
You try to open, move, or delete a file, and Windows tells you the file is locked by Windows Defe...
Fix Windows Defender Security Center Module Missing Error
You open Windows Security and see a blank page or an error saying the security center module is m...
Fix BitLocker Cannot Connect to Windows Hello Error
You may see the error 'BitLocker cannot connect to Windows Hello' when trying to set up or manage...
Fix Task Scheduler Connection Refused Error
When you see a 'connection refused' error in Task Scheduler, it usually means the service cannot ...
Topic paths
Quick titles
Remote Desktop Backup Restore Permission Error FixChrome Profile Sync Not Downloading on Windows 11Outlook Token Expired When Sending Email: How to FixMySQL Root Access Denied Troubleshooting GuidePermission Denied Windows Terminal Port TroubleshootingFix Cloudflare 525 SSL Handshake Error – ChecklistWindows 10 Outlook Service Unavailable TroubleshootingHow to Fix BitLocker Proxy Errors