Mine didn’t actually freeze, but I might have missed it. After I updated to 531.41, I got an overheat dialogue box during a flight in some simple GA bird and then the sim crashed (CTD).
I didn’t stick around to find out more. Just went to the nVidia site and re-installed my previous known good driver version 531.18. This was last week. No recurring problems since.
Others have reported similar problems in this forum with 531.41. nVidia issued a hot patch apparently, but until they get the update stabilized I am sticking with 531.18.