Forget it, I run 3 antivirus, 2 spyware (nothing found), and memtest.
Finaly i get the solution. Upgraded BIOS, Realtek Sound Dirvers, and Video Card Drivers (ATI), and Marvell LAN Drivers, and problem solved.
I dunno what was the drivers that generate the error, but im almost sure it was the BIOS firmware, cus it was 2 levels below actual (was F3, when Gigabyte released F5).
U can update it directly from windows with @BIOS utility from original Gigabyte CD, or downloading on web site (i dont have floppy, and cant create boot disk :)
The updates were refered to CPU Microcode and EIST (Enhaced Intel SpeedStep Tecnology), but i think it was the microcode update what solved the problem cus my CPU dont have EIST. (570j)
Check ur BIOS version, update drivers and check game again, i think u will solve ur problem.
Reply if u cant fix it after updating.
p.d.: I also disabled DEP on boot.ini, but didnt work first time. After update i dont enable it, but dunno if it will cause the error. PB guys said that could be the cause, but im not sure.