C:netstat -aon|findstr "80 "
TCP127.0.01:800.0.0: 0 Monitoring 2448
Look, the port is occupied by the process with process number 2448. Continue with the following command:
C:tasklist|findstr "2448 "
Thread.exe 2016 console 0 16064K
Very clear, isn't it? Thread is occupying your port, kill it.
If the second step cannot be found, open the task manager to see which process is 2448, and then kill it.
If you need to see other ports. Just change it to 80.