Fixing Windows Security Proxy Configuration Issues
When Windows Security (formerly Windows Defender Security Center) can't update virus definitions ...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix 'Windows Security Failed to Start Access Denied' Error
You click on Windows Security and see 'Windows Security failed to start. Access denied.' This usu...
Fix Remote Desktop 404 Error from SSL Certificate Issues
When you try to connect to a remote desktop and get a 404 error, it often points to an SSL certif...
Fix Outlook Auto Start Shortcut Not Working
You've set Outlook to start automatically when Windows boots, but the shortcut isn't working. Thi...
Fix Command Prompt Authentication Failed for Network Drive
When you try to map a network drive using net use in Command Prompt and get an authe...
How to Fix Windows Security Error 0x80070422
You open Windows Security and get error 0x80070422, or see a message that the app can't start. Th...
Topic paths
Quick titles
How to Move Chrome Profile to New ComputerHow to Fix Chrome Profile Error Loading ProfileMicrosoft Teams High CPU Usage: A Practical ChecklistHow to Make Outlook Start Automatically When Windows BootsStop Windows Terminal Memory LeaksFix 502 Bad Gateway When Windows Search Not WorkingFix Scheduled Tasks That Don't Start on TimeWindows Update 504 Error: Quick Fixes for Windows Security