For those of you who crash after the title screens (Blizzard and D2R):
I had opened a ticket for the problem described above and got a very nice reply recommending to uninstall all graphic drivers with DDU (Display Driver Uninstall), then reinstall them. I did and the problem is still there, BUT before reinstalling the nvidia drivers I tried to launch the game and lo and behold, it worked with the Win10 drivers. So this type of error may be some driver problem or conflict, Tech Support is trying to delve deeper into it. Will keep you updated.