I'm afraid it's not due to hardware problems ( apart that I never seen those Direct X issues) I have tested it on both machines here,one has a N'vidia 5200,the other has an ATI 9600 so different set of drivers...no way......
as soon as I move them or order to attack they CTD,sometimes it takes 20 seconds, other times, little more or little less,but it's definitely going to be a CTD...