Unable to connect pix hawk 2.4.8 to mission planner 1.3.80

I have been trying to connect my Pixhawk to Mission planner with no luck, for some reason the pixhawk isn’t being recognized when I plug it into the computer, it doesn’t see that it is there, so it is not giving me a COM port for it. When I go to device manager it shows that I have PX4 FMU COM3 with a hazard sign so it’s not working. I was wondering what I should do to fix this situation?