Fix 'Not Recognized as Internal or External Command' Error
You type a command in Command Prompt and see "'command' is not recognized as an internal or exter...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listFix Windows Update Offline Installer Not Working on Windows 10
You download the .msu or .cab file for a Windows 10 update, double-click it, and nothing happens—...
Fix PowerShell Authentication Failed to Remote Server
When you see 'Authentication failed' in PowerShell while trying to connect to a remote server, it...
How to Fix BitLocker 404 Not Found Error
If you see a "404 Not Found" error when trying to access BitLocker settings or repair tools, it u...
Fix Windows Security High CPU Usage on Windows 10
If your Windows 10 PC is running slow and Task Manager shows Windows Security (or Antimalware Ser...
How to Fix Chrome Connection Refused Error
When you see 'ERR_CONNECTION_REFUSED' in Chrome, it means the browser tried to connect to a serve...
Topic paths
Quick titles
Teams Camera Access Error TroubleshootingFix 'Command Prompt Not Found' Error After Windows UpdateWindows Update 502 Bad Gateway Troubleshooting GuideResolve Microsoft Teams Rate Limit Error 429Fix Windows Security Backup Not Restoring AutomaticallyTroubleshoot BitLocker 504 Gateway Timeout ErrorWindows Search Access Denied FixTroubleshoot Microsoft Store Timeout Error