Couldn't launch Mission Planner

Hi, when I try to launch MP I have Not responding message. And after some time, I have a message from MP telling me that I have to activate a service and put a parameter on 1 with regedit. Running W10 and never had this problem before. Try to find the parameters in regedit, no success. So what is the service that needs to be activated with MP? I have not this problem when I try to run APM 2.0 or QGroundControl. Thanks. Chris