I've emailed Asus with no reply yet and searched the web. This is the 2nd one to do this. All my hardware seems to be recognized in the BIOS. ASUS P4P800SE MB, after installation it will not load my operating system. I can get to the BIOS screens but after OK'ing there it takes me to a screen that says there was an error and to select startup (safe-mode,normal etc.). None of these options will load the operating system. Everything works fine with old P4S533 MB System: Microsoft XP Home operating system Intel CPU P4/2.4GHz 533M 478pin/512K Northwood Core (2) Kingston 512MB DDR333 PC 2700 Memory Western Digital HD 7200rpm 8MB Asus v9520 Magic (GeForce FX 5200) video-card 470 Watt power Supply Any ideas?