Judging by his title post, his OS is Win 8
And maybe its crash because he had using wrong version of trainer
Lol didnt really noticed the title, and yup probably wrong version which do not support win8 not the version of the game because it crashes upon authentication it doesnt cause the game to crash, also it can be a security issue..
If you are using Win 8 can not really help. But if its win 7 make sure you have reverted your IE to IE 9. Run the game and trainer in admin mode. Along with telling the A/V to ignore the trainer and that should be you.