Fix 'Command Not Found' Error in Windows 10 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 listWhy Windows Update Shows Paused but Still Running
You click Pause updates, but the progress bar keeps moving. Or you see 'Updates paused' but your ...
Fix Windows Defender Permission Denied Registry Error
When you try to modify Windows Defender settings through the registry, you might see an error lik...
How to Fix Microsoft Teams 404 Error by Clearing Cache
If you're seeing a 404 error in Microsoft Teams—often when opening a chat, channel, or file—it's ...
Fix PowerShell 404 Not Found on GET Requests
When you run a PowerShell Invoke-RestMethod or Invoke-WebRequest with t...
Fixing Windows Security Proxy Configuration Issues
When Windows Security (formerly Windows Defender Security Center) can't update virus definitions ...
Topic paths
Quick titles
Resolve Outlook 504 Gateway Timeout Not WorkingTeams Troubleshooting: Reset to DefaultFix Windows Task Scheduler Login Loop Error 0x8007052eCommand Prompt Opens Then Closes FixResolve Windows Security 504 Gateway Timeout in Windows UpdateFix Docker Pull Access Denied on Mac: Step-by-StepTroubleshoot Windows Defender Frozen LoginHow to Fix Windows Update Error 0x80070643