How to Fix Windows Defender Connection Refused Error
If you see a 'connection refused' message when opening Windows Defender or updating virus definit...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Update Error 0x80072ee2: DNS and Network Issues
Windows Update error 0x80072ee2 typically means your PC can't connect to Microsoft's update serve...
Fix PowerShell Login Loop Error 0x80070002
If you're stuck in a login loop after signing into Windows, and PowerShell or other system compon...
Fix Windows Activation Server Timeout Error 0x80072efd
When you see error 0x80072efd while trying to activate Windows, it usually means your computer co...
How to Fix Windows Defender Not Opening on Mac
If you're running Windows on a Mac via Boot Camp or a virtual machine and Windows Defender won't ...
How to Fix Windows Defender Error 0x80070422
When you see error 0x80070422 while trying to start Windows Defender, it typically means the Wind...
Topic paths
Quick titles
Windows Defender Real-Time Protection Stuck Scanning FixFix Windows Activation Error 0x8007007b on UbuntuFix Cloudflare DNS Not Resolving on AndroidFixing Windows Terminal Dependency Conflict and Permission Denied ErrorsOneDrive Sync 502 Error TroubleshootingHow to Handle Teams Rate LimitsFix Windows Defender Service DisabledSet Task Scheduler to Wait for Network