How to Reset Windows Defender Settings
If Windows Defender (Microsoft Defender Antivirus) is acting up—won't open, shows error messages,...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows Defender Threat History Not Loading Due to Timeout
When you open Windows Security and click on 'Threat history', you might see a spinning circle fol...
How to Fix Windows Defender Firewall Blocked App
You try to open an app, but it either won't start or can't connect to the internet. A common caus...
Fix Microsoft Teams Authentication Failed Error
You open Microsoft Teams, try to sign in, and get an 'Authentication failed' error. This usually ...
Fix Command Prompt Authentication Failed in Windows 10
If you see 'authentication failed' when using Command Prompt in Windows 10, it usually means your...
How to Fix 'File Locked by System' in Windows Defender
If you see an error like "File locked by system" when running a Windows Defender scan or trying t...
Issue queue
SitemapResolve Chrome Dependency Conflict Error
How to Fix Node Version Mismatch in npm install
npm Permission Denied on node_modules: Troubleshooting Guide
Fix Firefox Profile Missing Error 0x80520007
How to Troubleshoot Firefox Not Responding with Safe Mode
Fix PowerShell Ubuntu Command Not Found on Windows
Reduce Windows Security CPU Load
How to Fix Windows Security Not Starting Automatically
Bypass Proxy Server for Windows Activation
How to Fix Windows Terminal Update Permission Denied
Chrome Extension Permission Denied: How to Fix
Troubleshooting Chrome Cache Issues After Settings Change
How to Fix Node Version Mismatch in npm install
npm Permission Denied on node_modules: Troubleshooting Guide
Fix Firefox Profile Missing Error 0x80520007
How to Troubleshoot Firefox Not Responding with Safe Mode
Fix PowerShell Ubuntu Command Not Found on Windows
Reduce Windows Security CPU Load
How to Fix Windows Security Not Starting Automatically
Bypass Proxy Server for Windows Activation
How to Fix Windows Terminal Update Permission Denied
Chrome Extension Permission Denied: How to Fix
Troubleshooting Chrome Cache Issues After Settings Change