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 listFix OneDrive Version Mismatch Error 0x8004de40
When you see error 0x8004de40 in OneDrive, it usually means the app version on your computer does...
Fix OneDrive Stuck on 'Resolving Changes' Error
You open OneDrive and see 'Resolving changes' stuck for minutes or hours. Files won't sync, and t...
Fix PowerShell 502 Bad Gateway with Curl
If you're seeing a 502 Bad Gateway error when running curl commands in PowerShell, it usually mea...
Fixing 'Access Denied' Errors When Running PowerShell Scripts
If you see an 'Access Denied' error when trying to run a PowerShell script, it's usually not a pe...
Fix BitLocker Stuck Loading After Windows Update
After a Windows update, some users report that BitLocker gets stuck on the loading screen, either...
Topic paths
Quick titles
Fix Remote Desktop Login Issues by Resetting CredentialsHow to Fix Windows Update Error 0x8024402cPowerShell Common Error FixesFix Invalid Configuration in Chrome Enterprise PoliciesHow to Configure Microsoft Teams After InstallationOutlook Hanging on Profile Repair – SolutionsEnable Chrome Profile Backup Before Migration: Step-by-StepHow to Fix Outlook Error 0x80040600 (Corrupt Data File)