Windows Defender Service Troubleshooting Checklist
If Windows Defender won't start, won't update, or shows error messages like "Service stopped" or ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix VS Code Terminal 'Permission Denied' in PowerShell
When you open the integrated terminal in VS Code and run PowerShell commands, you might see a 'pe...
Fix Chrome DNS_PROBE_FINISHED_NXDOMAIN Error
You're trying to load a website in Chrome, but instead you see: This site can't be reache...
Fix Windows Security Connection Refused via Group Policy
You open Windows Security and see 'Connection refused' or 'Something went wrong.' Often this happ...
BitLocker Drive Encryption Stuck at 0%: How to Fix
You start BitLocker encryption on a drive, but the progress stays at 0% for an extended time. Thi...
Fix BitLocker Connection Timeout Error Code
You see a BitLocker connection timeout error when trying to unlock a drive or during recovery. Th...
Topic paths
Quick titles
How to Clear Microsoft Store Token ExpiredHow to Fix Windows Activation Authentication Failed ErrorTroubleshooting Git Pull Merge Conflict Not CompletingHow to Delete a Locked File Using Command PromptHow to Fix Windows Terminal Log File MissingResolve Windows Activation Delay After Changing ComponentsFix Task Scheduler Without Reinstalling WindowsFix OneDrive Sync Module Not Found Registry Error