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 Microsoft Teams 404 Error by Clearing Cache
If you're seeing a 404 error in Microsoft Teams—often when opening a chat, channel, or file—it's ...
Fix Windows Update Error 0x80070005: Permission Issues
When Windows Update fails with error 0x80070005, it usually means the update process doesn't have...
Fix Windows Security Authentication Failed in Remote Desktop
When you try to connect to a remote PC and see "Windows Security" followed by "Authentication fai...
Fix Microsoft Teams Sync Error with Outlook Calendar
When Microsoft Teams stops syncing with your Outlook calendar, you might see missing meetings, du...
Fix 'Command Prompt Auto Start Registry Permission Denied' Error
You're trying to configure Command Prompt to launch automatically at startup by editing the Windo...
Topic paths
Quick titles
Task Scheduler Running Status Stuck: Troubleshooting GuideOutlook Stuck Loading When Opening Attachments? Try These FixesFix Microsoft Store Installation Failed ErrorFind Task Scheduler History Log in Windows 10Windows Update Connection Refused Error After Network ResetHow to Resolve Task Scheduler Error 0x80070005How to Fix Invalid Configuration Registry in Microsoft StoreChrome Update Stuck Error 12 Fix