Fix Outlook Module Not Found Error 0x80040154
You open Outlook and get an error: 0x80040154 — "Class not registered" or "module no...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Nginx Config Test Failure After Adding SSL Certificate
You added an SSL certificate to your Nginx server block, ran nginx -t, and got an er...
How to Fix Outlook Cannot Connect to Yahoo Mail
If Outlook stops connecting to your Yahoo Mail account, you're not alone. This usually happens af...
Fix Windows Terminal Credential Loop: Step-by-Step
If Windows Terminal keeps prompting for your credentials in a loop—even after entering the correc...
Fix Windows Security Access Denied When Opening Settings
You click Windows Security in the Start menu or try to open Virus & threat protection, and instea...
How to Close a Locked File Handle in PowerShell
You try to delete or move a file, but Windows says it's open in another program. PowerShell can h...
Issue queue
SitemapWindows Update Invalid Configuration: Stuck on Checking
Fix ERR_CONNECTION_RESET After Network Change in Chrome
Resolve Microsoft Teams Migration Hanging Issues
Resolve Chrome Profile Port Conflict
Fix Outlook Reset Settings Error 0x8004010f
Troubleshoot Windows Search Connection Refused
Fix OneDrive Not Syncing After Windows 11 Update
Windows Security High CPU Usage Fix
Windows 10 BitLocker Recovery Key Not Working? Here's Help
Chrome Update Causes Service Unavailable
Fix Windows Activation 504 Timeout When Connecting to KMS Server
Task Scheduler 502 Bad Gateway Fix Guide
Fix ERR_CONNECTION_RESET After Network Change in Chrome
Resolve Microsoft Teams Migration Hanging Issues
Resolve Chrome Profile Port Conflict
Fix Outlook Reset Settings Error 0x8004010f
Troubleshoot Windows Search Connection Refused
Fix OneDrive Not Syncing After Windows 11 Update
Windows Security High CPU Usage Fix
Windows 10 BitLocker Recovery Key Not Working? Here's Help
Chrome Update Causes Service Unavailable
Fix Windows Activation 504 Timeout When Connecting to KMS Server
Task Scheduler 502 Bad Gateway Fix Guide