Fix Windows Defender Service Not Starting (Error 404)
If you see error 404 when trying to start Windows Defender, it usually means the service executab...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listWindows Defender Exclusions for Gaming Performance
If your games stutter, take long to load, or feel sluggish, Windows Defender might be scanning ga...
Fix BitLocker Access Denied on External Hard Drive
You plug in an external hard drive that was encrypted with BitLocker, but Windows shows 'Access D...
How to Fix Windows Update Dependency Conflicts
You click 'Check for updates' and see an error, or updates download but fail to install with a me...
Fixing Task Scheduler Token Expired Sync Issues
You set up a scheduled task to sync data, but it stops working after a while. The event log shows...
Fix BitLocker 'Permission Denied' on Encrypted Drive
You plug in a BitLocker-encrypted drive, enter the password, and get 'Access Denied' or 'Permissi...
Topic paths
Quick titles
Fix Chrome Backup Restore Access DeniedWindows Search Permission Denied TroubleshootingChrome Profile Network Error: Clear Cache GuideFix Chrome Profile Download Error on MacFix 'ffmpeg not recognized' Error on MacHow to Fix Microsoft Teams Offline Installer Launch FailureWindows Terminal Update Login Loop TroubleshootingFix PowerShell 404 Error When Accessing URL