You put me in the right track. I set it to manual and I stop it. CPU% went down significantly.
However, every time after restarting, WMPNETWK.EXE starts again at booting. I checked the Resources Monitor in the Task Manager and I see how despite of not opening anything it was taking more CPU % every moment. I went back to Services and I stopped again (still was in MANUAL). The CPU usage went down.
To make sure the the media streaming was disabled I open the Advanced Sharing Options and It was something strange there: It says "Media streaming is on" I click in the "Choose media streaming options..." and it says Media Streaming is NOT turned on" So, it is or it is not?
Finally I decided to open the WM Player The CPU usage went up to 100% and stays there. If I click in a song it takes a short while before the song starts playing. Playing a stupid song should not take any resources I have a dual core CPU! I can't believe that WMP is using all the CPU "Retrieving media info" and "updating the media library" . Could you please tell me if it will ever finish "retrieving" and "updating" or how I disable that access. I just want to listen to a song and have a system with a quick response.
Note: if I wait 5 or 10 minutes the WMP finally become responsive. (but it keeps retrieving info) I don't want to wait 5 minutes to listen to a song and have my system back.
Please throw me another hint, I will try to figure this out.