I am trying to launch a program which is uses port 29178 but it won't start up because it says the port is already in use. Netstat gives me this

```
C:\Rush>netstat -aon | findstr 29178
  TCP    0.0.0.0:29178          0.0.0.0:0              LISTENING       4
  TCP    [::]:29178             [::]:0                 LISTENING       4

```

and process 4 is

```
Name                Pid Pri Thd  Hnd   Priv        CPU Time    Elapsed Time
System                4   8 154 5280    120     0:01:55.269     0:37:14.169

```

which tells me what exactly? Is Windows using this? How do I know what feature is using it or how to turn it off/change it?