How to Fix 'Command Not Found' in Command Prompt
You type a command in Command Prompt and get 'xxx' is not recognized as an internal or exte...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Search Returning 404 Not Found Error
When you search for a file or app in Windows and click a result, you may see a ‘404 Not Found’ er...
Outlook Token Expired When Sending Email: Fixes & Checks
You're composing an email in Outlook, hit Send, and get an error about an expired token. This usu...
Microsoft Teams Not Installing on Windows 10: Fixes
You click the installer, the progress bar moves, then nothing—or an error. Teams won't install on...
How to Fix OneDrive Sync Module Not Found
If you see 'OneDrive sync module not found' when trying to start OneDrive, the app cannot find it...
Fix 'Outlook Service Unavailable' After Disabling Firewall
If you disabled your firewall and now Outlook shows 'service unavailable,' you’re not alone. This...
Topic paths
Quick titles
Resolve BitLocker Encryption Setup ErrorsWindows 10 Command Prompt Fails to Start – Troubleshooting GuideEnable File History Backup on Windows 10: Troubleshooting GuideHow to Set Up Outlook for Mac: Step-by-Step GuideFix Windows Search Not Working in File ExplorerResolve BitLocker Port Conflict in Windows 11Fix Windows Security Migration Slow PerformanceHow to Resolve Go Proxy 403 Forbidden