Port 9001 used by Microsoft-HTTPAPI/2.0
Solution 1:
After Daniel B comment I did the following:
$ netsh http show servicestate
Snapshot of HTTP service state (Server Session View):
-----------------------------------------------------
Server session ID: FF00000520000001
Version: 2.0
State: Active
Properties:
Max bandwidth: 4294967295
Timeouts:
Entity body timeout (secs): 120
Drain entity body timeout (secs): 120
Request queue timeout (secs): 120
Idle connection timeout (secs): 120
Header wait timeout (secs): 120
Minimum send rate (bytes/sec): 150
URL groups:
URL group ID: FE00000540000001
State: Active
Request queue name: Request queue is unnamed.
Properties:
Max bandwidth: inherited
Max connections: inherited
Timeouts:
Timeout values inherited
Number of registered URLs: 1
Registered URLs:
HTTP://+:9001/IGCC/SERVICE/
Request queues:
Request queue name: Request queue is unnamed.
Version: 2.0
State: Active
Request queue 503 verbosity level: Basic
Max requests: 1000
Number of active processes attached: 1
Process IDs:
5592
And now I get the culprit Process IDs: 5592,
IGGC/Service stands for
Intel Graphic Command Center