I know this problem might be unrelated to the game itself, but I guess it doesn't hurt to ask:
In some rare ocasions, after playing for a while it may happen to the screen to go black for a few moments, then I get the message "display driver stopped responding and has recovered", followed by the game crashing.
I know this may be a problem with my machine rather than the game, but after several years of gaming H&H still is the only game this problem ever happened.
I updated my graphic driver about a month ago. It happened a few times before, happened again today.
Some specs of my machine:
Windows 7 64-bits
Intel core i7 4790 @ 3.60GHz
8gb ram
Nvidia Geforce GTX 970
Java 9.0.1 64 bits