MongoDB Authentication Failed Error 18: Causes and Fixes
When you see MongoDB AuthenticationFailed (error code 18), it means the server r...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows 11 Activation Rate Limit Error
You're trying to activate Windows 11 and see an error like "Activation rate limit reached" or "To...
Fix Chrome User Profile Configuration Errors
You open Chrome and see an error like "Your profile could not be opened correctly" or "Chrome use...
Fix Windows Update Error 0x80072efd (Network Issue)
Error 0x80072efd usually appears when Windows Update can't connect to Microsoft servers. It often...
Fix Windows Search Connection Refused Network Error
If you see 'connection refused' when searching network locations in Windows, it usually means the...
How to Fix Windows Security 502 Bad Gateway Error
When you open Windows Security and see a “502 Bad Gateway” error, it means the app can’t connect ...
Topic paths
Quick titles
Windows Defender Error 0x80070422: Quick Fix GuideResolve OneDrive Sync Error 0x8007016aWindows 11 Command Prompt Access Denied TroubleshootingChrome Proxy Connection Failed After Update FixHow to Fix Slow Command Prompt Startup in Windows 10Fix Windows Defender Real-Time Protection Stuck OffGroup Policy Guide: Disable Windows Defender Real-Time ScanningComplete Windows Security Setup Checklist