Fix OneDrive Sync Error 0x8004de40 – Authentication Failure
You're working on a file when OneDrive pops up an error: "Authentication failed – Error c...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Chrome SSL Error: Cannot Connect to Website
You try to open a website in Chrome but see an error like “Your connection is not private...
How to Setup Command Prompt Logging to a Text File
When troubleshooting or documenting command-line tasks, saving Command Prompt output to a text fi...
Fix Windows Activation Auto-Start Missing from Services
You open Services.msc to check the Windows Activation service and find its startup type set to Ma...
Fix Windows Update Path Not Found After Clean Boot
After performing a clean boot to troubleshoot system issues, you might see a 'path not found' err...
Fix OneDrive Sync Path Missing from Registry
If OneDrive won't sync and you see 'Path not found' errors, the registry entry for your sync fold...
Topic paths
Quick titles
BitLocker Troubleshooting Guide for Enterprise UsersHow to Fix Windows Defender File Locked ErrorFix Chrome Extension Sync Permission Denied ErrorOutlook Proxy Error Checklist: Fix Connection IssuesRecovering Corrupted RAR ArchivesFix Windows Search Not Indexing in Dual Boot with UbuntuHow to Fix Chrome High CPU Due to Corrupt ProfileOneDrive Sync Path Not Found Group Policy Fix