How to Fix Port Conflicts on Windows Using WinNAT Reset or Process Kill

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Port conflicts on Windows are commonly caused by the WinNAT service incorrectly reserving ports, preventing other applications from using them. The quickest fix is to restart the WinNAT service by running 'net stop winnat' followed by 'net start winnat' in an elevated PowerShell or CMD window. If the issue persists, the port may be genuinely occupied by another process such as PHP-FPM, SonarQube, or MinIO. Users can identify the conflicting process by running 'netstat -ano | findstr :9000' to find the associated PID. Once identified, the process can be terminated via Windows Task Manager under the Details tab.

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ProgrammingDEV Community ·

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