Alright, i can't play dungeon defenders because a thing i don't know how to fix. Alright, let's go:
On my other computer, dungeon defenders worked fine, without any errors, and now, i bought this PC last year. I played Dungeon Defenders on first week on my new computed, if is better than the old. Next day, i tryied to play again, butt something strange happens. When i click "start game" on steam hub, appears: "trying to run dungeon defenders" or something same, but disappears some seconds later, and the game don't starts. I call my brother and he tried to re-install the game, verify the compatibillity, but was the same thing, and i can't play.
I decided to find help, but i don't found it on net. So, i gived up on the game, i has bought it.
Now, i decided to ask help here, for see if someone knows what happening and how to fix it.