I had mission planner running great on my PC, then last night something happened and every time I tried to launch it, it would hang on the loading window and go to (Not Responding) status. I have a dual monitor setup on my PC, and going into the display settings then selecting to only show the desktop on display 1, then launching mission planner fixed the issue. I can now re-enable the 2nd monitor and it is still working.
Just an FYI for anyone else it might help
I’m running Windows 10 x64 PRO with an Nvidia GTX 2070.