I just bought a new Acer desktop. I had to re-install the OS via an image using Acronis. After the restoring process was finished and restarted the computer, the usual Acer logo did not show. Instead the American Megatrends did. Now when I press the del key the system tells me Entering Set-up..., but it just stays there. The computer will not reboot from the HD and I can't get into the BIOS to check what is going on. Any suggestions?