Fix Windows Security 404 Not Found Permissions Issue
You open Windows Security and see a 404 Not Found error, or the app won't load at all. Often this...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFixing Windows Security 502 Bad Gateway Errors
If you see a 502 Bad Gateway error in Windows Security (or the Windows Defender portal), it usual...
Fix OneDrive Sync Stuck on 'Checking Status'
If OneDrive is stuck on 'Checking status' and files aren't syncing, it's often due to a stalled s...
Fix Windows Update 502 Bad Gateway Connection Issue
When Windows Update fails with a "502 Bad Gateway" error, it usually means the update server can'...
Fix Windows Defender Threat Service Stopped & No Internet
You open Windows Security and see 'Threat service has stopped. Restart it now.' At the same time,...
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...
Topic paths
Quick titles
Stop Chrome Profile File Locked MessageHow to Fix Windows Search Authentication Failed Permission DeniedTask Scheduler Logging Configuration StepsEdge Profile Sync Paused Permission Denied FixFix Chrome Profile Access Denied Error on WindowsTroubleshoot Slow Command Prompt in Windows 7Fix Remote Desktop 502 Bad Gateway on Windows 10Resolve Invalid Configuration Error in PowerShell Remoting