Hi. You should post your couatl error log (the one mentioned in the picture) here, so Umberto can see it. He sure can help you. First of all: Did you installed the correct Version of the GSX (there are separate ones for Prepar3d 4 and FSX) and did you run it with antivirus and firewall off? Then you should check, if your antivirus does not block the folder and last: try to run the GSX updater, sometimes it does miracles in fixing missing things that could lead to those errors. Don't worry, it sure can be fixed.