How to Kill a Process Using a Port in Command Prompt
When you try to start a local server or application and see an error like "port already in use" o...
Checklists for software errors, setup, and tool workflows.
1. Reproduce
2. Isolate
3. Apply
4. Verify
Latest checklists
View listHow to Fix Remote Desktop Port 3383 Already in Use
When you try to start a Remote Desktop session and get an error that port 3389 is already in use,...
Fix Dependency Conflict Blocking Windows Activation Setup
You try to activate Windows, but the setup fails with a message about a dependency conflict. This...
Fix BitLocker Mount Error 0x80070005 on Mac
When you connect a BitLocker-encrypted drive to a Mac and try to mount it, you may see error 0x80...
Fix OneDrive Sync Pending Due to Long File Names
You see "sync pending" in OneDrive, and the file won't upload or download. Often the culprit is a...
Fix Chrome Profile SSL Certificate Error: Certificate Expired
You open Chrome and see a red warning: "Your connection is not private" or "NET::ERR_CERT_DATE_IN...
Topic paths
Quick titles
Windows Defender 0x800705b4 Troubleshooting GuideOneDrive Sync Stuck: File Locked SolutionOneDrive Permission Denied Error FixFix Microsoft Store Error 0x80073cf6: Port Already AllocatedFix OneDrive Sync Error 'Version Mismatch' on Windows 10How to Resolve Chrome Profile Service ErrorTroubleshoot Outlook Blank Screen After UpdateFix Windows Update Connection Refused Due to Proxy Settings