I've had Windows 10 installed and running fine for a few months now. In that time I've used two 1920x1200 monitors without issue in both Mojave and Windows 10. This afternoon I moved the computer into the living room to hook it up to the TV, a 4k Samsung, through my Denon AV receiver. MacOS worked fine no matter what resolution I set it to, however when booting into Windows the computer becomes unusably slow and unresponsive. I managed to try a few different resolutions and scaling options but nothing seemed to have any effect (though turning scaling off and running at 100% seemed to improve things slightly). I'm not really sure what's going on. ATI drivers and installed and current. Any thoughts?