After doing a normal install of DJI Assistant, I found that Win10 was not recognizing my MP as a valid USB device. Since DJI is using unsigned Android drivers, they were not successfully installed. Solution is to go to windows setting->Update & Security->Recovery and choose Advanced Startup. At the prompt during windows boot choose to do selective startup. option #7 is "disable signed driver verification". After that booted up, when I re-installed Assistant again, I received Prompts to confirm unsigned driver installation. Now Win10 can see my MPin Assistant. Hope this helps someone.