Fix Outlook Module Not Found Error 0x80040154
You open Outlook and get an error: 0x80040154 — "Class not registered" or "module no...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Outlook DNS Error Configuration
When Outlook can't connect to your email server, a DNS error configuration is often the culprit. ...
Fix Microsoft Teams Dependency Conflict Error Code
When you launch Microsoft Teams, you may encounter a dependency conflict error with a specific er...
Fix OneDrive Sync ‘Service Unavailable’ and ‘Permission Denied’ Errors
When OneDrive reports “Service Unavailable” or “Permission Denied” during sync, the problem is us...
Fix PostgreSQL Password Authentication Failed on Windows 10
You're trying to connect to PostgreSQL on Windows 10, but you get 'password authentication failed...
Windows Defender Troubleshooting Checklist for Beginners
Windows Defender (now Microsoft Defender Antivirus) usually runs quietly in the background, but s...
Topic paths
Quick titles
Troubleshoot PowerShell Module Not LoadingHow to Fix Chrome Command Not Found on MacHow to Fix Windows Update Token Expired ErrorStop RDP Certificate Warning on Trusted NetworksHow to Reset Chrome Without Losing BookmarksWindows Defender Port Conflict: Step-by-Step FixHow to Fix Windows Search High CPU from Permission DeniedTroubleshooting 'No Matching Distribution Found' for requirements.txt