crash and windows screwed

[yker34]

Hi,

I bought the game from Steam and try to play it. It starts well and I can see the intro video and create a new game, but when the first level (the hall where player is trained)... the game crashes but what is worst is that windows is deactivated, i can see only a black screen and the task manager doesn´t works anymore (can´t use CRTL-ALT-DEL to go to the desktop) so I MUST TURN OFF my computer manually, which seems oddly.

What can I do to solve this? I really NEED TO PLAY THIS GAME!

My computer is an AMD TURION 64 with 2.5 RAM and 128 in video memory.

Thanks

Post here since I can´t found a solution