How to Fix 'Outlook File Locked in Use by Another Process'
If you see the message 'Outlook file locked in use by another process' when trying to open Outloo...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix OneDrive Sync Timeout and Permission Denied Errors
You see "sync timeout" or "permission denied" in OneDrive, and files aren't updating. This usuall...
Fix Windows Activation Cache Corruption
You try to activate Windows, but the activation fails with an error like '0xC004F074' or 'The act...
Fix Windows Update High CPU Usage and Error 0x80070002
When Windows Update runs, you may see high CPU usage and eventually error 0x80070002. This usuall...
Fix OneDrive Token Expired Error (0x8004de40)
You open OneDrive and see an error like “Your token has expired” or code 0x8004de40. This usually...
How to Fix Windows Security Auto Start Disabled
If you notice that Windows Security (formerly Windows Defender) isn't starting automatically with...
Topic paths
Quick titles
How to Clear Windows Security Threat History That Won't DeleteFix Stuck Windows Store Downloads: Step-by-Step GuideHow to Fix Chrome Sync Server ErrorsChrome Connection Reset Error on Windows 10 FixTroubleshooting 404 Errors with Invoke-RestMethodBitLocker Not Working Post Update: TroubleshootHow to Troubleshoot Outlook Version MismatchTroubleshoot Task Scheduler Hang Issues