We are near to find the problem. You can try something for me, if you start the bot try to avoid use the alt key means something like " alt + tab " the whole time you are botting.
Tell me if this avoid the crash.
I used only my mouse the whole time. I actually have an entire computer just for botting with a fresh install of win 8 and heros. nothing else. I start heros, start the bot, and click start. no other keystrokes were used. hope that helps!