Fix Windows Defender Proxy Error 0x80070422
If you see error 0x80070422 when opening Windows Defender or running a scan, it usually means the...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Missing Windows Security After Update
After a Windows update, you might find that Windows Security (formerly Windows Defender) is missi...
Fix 'PowerShell Is Not Recognized' Error on Windows
You type a PowerShell command in Command Prompt or a script and see: 'powershell' is not re...
Fix Remote Desktop Certificate Error via Group Policy
When you connect to a remote desktop and see a certificate error, the connection may still work, ...
Fix Microsoft Store Not Opening After Update
After a Windows update, the Microsoft Store may fail to open or load properly. This is often due ...
Fix Windows Activation Error 0x8007007b on Ubuntu
If you see Windows activation error 0x8007007b while using Ubuntu (for example, in a dual-boot se...
Topic paths
Quick titles
Fix Remote Desktop Group Policy Error on StartupTroubleshoot Microsoft Store Connection RefusedFix Outlook Connection Refused Due to Firewall SettingsResolving Chrome Certificate Error Common Name InvalidTroubleshooting Windows Terminal Missing CommandsFix Chrome High Memory Usage That Won't Drop After Closing TabsChrome Memory Saver: Keep Tabs Open, Use Less RAMMicrosoft Store High Memory & Error 0x80073cf0 Fix