Crashes without error report

This happened twice to me today, both times on the campaign map. The first time, I right clicked on a hastati unit card and the game just shut off. The second time was when I clicked the check button on the princepes unit card to close the window. No "______ is not responding" or any other error messages, the game just turned off and I was back at my desktop.

I have a HPi7, with a 64bit windows 7 os. I use a gtx 770 nvidia graphics card.

What do I need to do to fix this issue?

I got the same problem