Hello everybody My name is Gustavo, to Buenos Aires, Argentina. Sorry, but my english is not good. I have a problem. My computer in system Mac Os X is not shut down. The system is log out, but the screen still with my wallpaper. Intel Core 2 DUO 6700 Mother ASUS p5w dh deluxe 4 gb ram dual channel (4x1gb) 2 hard disks 250gb sata2 wester digital caviar 300 16mb buffer graphic card asus gforce en7600gt 256mb ddr3 dvd rw LG mouse and keyboard genius ps2 2 Systems 1 disk= Windows XP professional, service pack 4 2 disk= Mac OS X 10.4.5 Thanks!!!!