Fix OneDrive Token Expired Error (0x8004de40)
You open OneDrive and see an error like “Your token has expired” or code 0x8004de40. This usually...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listBitLocker SSL Certificate Error Setup Guide
When setting up BitLocker Drive Encryption, you might encounter an SSL certificate error. This us...
Fix Windows Security Not Starting After Update
After a Windows update, you might find that Windows Security won't open, or it shows a blank wind...
Fix Windows Search Fails with DNS_PROBE_FINISHED_NO_INTERNET
You type a query into the Windows Search bar, and instead of results, you see “No internet” or a ...
Fix Windows Defender Credential Loop: Step-by-Step
You try to open Windows Defender or run a scan, and it keeps asking for your admin password or PI...
Fix Windows Update Authentication Failed via Credential Manager
When Windows Update fails with an authentication error, the problem often traces back to stored c...
Topic paths
Quick titles
Microsoft Teams Guest Authentication Failure FixFix 'python' Not Recognized in Command PromptResolve Chrome Profile Access ErrorFix Windows Update Error 0x80070002 Permission DeniedTroubleshoot Windows Search Sync Failure Post-ResetFix Chrome Version Mismatch ErrorsWindows 10 Command Prompt Proxy TroubleshootingMicrosoft Teams Network Sign-In Error Fix