Fix 'Windows Security Failed to Start Access Denied' Error
You click on Windows Security and see 'Windows Security failed to start. Access denied.' This usu...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listWindows Defender Troubleshooting Checklist for Common Errors
Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background. But w...
Fix Windows Defender Path Not Found Registry Error
If you see a 'Path not found' error when accessing Windows Defender settings or running a scan, t...
Fix Chrome Profile Configuration Corrupt Not Working
When you see "Your profile could not be opened correctly" or Chrome simply refuses to start, the ...
Fixing SSL Certificate Errors in Windows 10 Edge Browser
When you see an SSL certificate error in Microsoft Edge on Windows 10, the browser blocks the pag...
Fix Windows Activation Port Already Allocated Error
When you try to activate Windows and see an error like "port already allocated" or "address alrea...
Topic paths
Quick titles
Fix Windows Security Not Working in Ubuntu VMMySQL Root Access Denied Troubleshooting GuideOneDrive Sync Error Authentication Failed GuideOffice 365 Token Expired Error in Windows SearchVirtualBox 0x80004005 Kernel Driver FixOutlook Repair Tool Stuck Loading: Command Line FixFix Windows Activation SSL Certificate Error Not WorkingWindows Defender Disappeared After Update – Fix