It is related to the video driver, nvlddmkm.sys and in many cases seems to involve the DPC watchdog. The occur just by clicking on the Start Button, or the Notifications icon and having a window open at the time may be involved. I also get many messages about how the video driver has stopped responding and recovered. If it doesn't recover, probably a Bluescreen results. On my other system I get dxgkrnl errors. On that system also, the Bluetooth seems to be a large problem. If I install drivers from ASUS, I end up with a system which will only boot to the lock screen. I have not found a way to get past it and the CTRL-ALT-Delete or Winkey+Power button do not help. What is strange, I notice my USB mouse is not powered in that condition, so clicking the lock screen probably has no effect. For all I know, the keyboard may not be powered either. The bottom line for me is this build is not really usable. Hopefully the one on Wednesday will be better.