I just got a computer that has no hard drive in it and will not boot with one in it. I've tried three different hard drives and I've tried booting by CD. Nothing works, it just keeps looping back to the screen that gives me the option to put in safe mode, etc. It will not boot into safe mode or last good configuration. Two of the hard drives that I tried are used on a daily basis, so I know they are good. I've even formatted one with a new copy of windows on it, still no luck. The third hard drive is an old 1gig with Windows 95 on it. Its runs the way that it's supposed to. The computer is 2.8ghz which is too much for 95, but it still lets me boot up in safe mode. I had to downgrade to 512 ram to do this also. I've tried different PSUs, hard drives, RAM, CD-Roms and booting from CD all ending up the same way, except for the old Windows 95 hdd. I've tried everything in BIOS, too. Does anybody have any idea what could be causing this? I'm hoping it's not a faulty mobo. Thanks all.