How to Fix Windows Defender Service Unavailable in Windows 10
If you see 'Windows Defender service unavailable' in Windows 10, the antivirus may be disabled or...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Defender DNS Error on Windows 10
If you see a DNS error in Windows Defender on Windows 10, it usually means the app can't reach it...
BitLocker DNS Error Checklist for IT Admins
IT admins sometimes see DNS-related errors when BitLocker attempts network unlock or contacts a r...
Fix Chrome Profile Offline Installer Permission Denied Error
When you try to install Chrome using an offline installer (the full standalone installer, not the...
Outlook Permission Denied Shared Mailbox Fix
When you try to open a shared mailbox in Outlook and see 'permission denied', it usually means th...
Fix Microsoft Store 404 Not Found After Update
After a Windows update, you might open Microsoft Store and see a 404 Not Found error when trying ...
Topic paths
Quick titles
OneDrive Startup Sync Issues ChecklistCommand Prompt Proxy Authentication Error FixFix 'Cannot Access File Because It Is Locked' in Command PromptTroubleshooting Chrome Error 12 (Network)Windows Firewall Setup ChecklistHow to Fix OneDrive Timeout and Permission IssuesHow to Fix a Locked File in Microsoft TeamsWindows 11 Command Prompt Auto-Start Not Working: Fixes