Mathijs thanks for your answer. I don't know wich tool it is coming from. I have all security off from windows. At least the ones I know and are visible to me. I don't have Avast. The tool is deleted and I don't have access to it. edit / I also installed Oslo and Trondheim. These configuration files didn't have warnings.
I try to install the scenery. I have all the security off So no firewall and no windows defender, also no other virus scanner. But stil I get a virus warning. See screen. I ignored the message but the file needed to config the airport is not installed.