Find the process using a specific port

From an elevated prompt run

netstat -aon | findstr :9990

That will give you the offending PID:

TCP    127.0.0.1:9990         0.0.0.0:0              LISTENING       1776

Quick check in Windows Task Manager will give you the process that is currently using the portWTMServices
so you can shut it down from there if need be.

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