I'm having a little trouble booting my system and I would appreciate your help VERY much. When I boot up my system, the ASUS fullscreen logo screen appears with the "press tab to go post or del to go to bios" or something like that on the bottom of the screen. Sometimes (or, half the time) I freeze on this screen. Even when I press tab or del it doesn't do anything. I have to manually restart several times for it to boot correctly. Please, can anyone help me with this issue? Thank you very much.