Answers for "how to free port in windows"

remove port binding windows

netstat -a -n -o | findstr :80
TaskKill /PID pidnum

kill port

:8080.
C:\Users\psmith>netstat -ano|findstr "PID :8080"
Proto Local Address Foreign Address State PID
TCP 0.0.0.0:8081 0.0.0.0:0 LISTENING 18264

taskkill /pid 18264 /f

stop kill network connection using cmd line

FOR /F ... %variable IN ('command') DO otherCommand %variable...