windows find port usage
netstat -aon | findstr<port_number>
eg: netstat -ano | findstr 8081
windows check details of process id
tasklist /fi "pid eq <process id>"
eg: tasklist /fi "pid eq 4716"
Kill Process forcefully
taskkill /im myprocess.exe /f
The "/f" is for "force". If you know the PID, then you can specify that, as in:
taskkill /pid 4716 /f