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 listFix OneDrive 504 Gateway Timeout: Setup & Troubleshooting Guide
When you see a 504 Gateway Timeout error in OneDrive, it means the server didn't respond in time....
Task Scheduler Permission Denied After Resetting Settings
After resetting Task Scheduler settings, you may see 'access denied' errors when trying to create...
Fix Windows Search Sync Issues with Outlook
If your Windows Search stops finding Outlook emails, appointments, or contacts, the search indexe...
Fix Windows Defender Virus Definition Update Errors
When Windows Defender fails to update virus definitions, you might see error codes like 0x8007000...
Fix Windows Defender Service Unavailable Error
You open Windows Security and see the message 'Windows Defender service unavailable' or 'Windows ...
Topic paths
Quick titles
Terminal Service Unavailable After Update: Quick FixesHow to Fix Teams Module Not Found After UpdateChrome Invalid Profile Configuration Error FixHow to Resolve SSL Certificate Expired in Task SchedulerWindows Terminal Invalid Config: Reset to DefaultHow to Resolve Windows Activation Dependency ConflictsMicrosoft Teams CLI Missing on Mac: TroubleshootingTroubleshooting 404 in Windows Command Prompt