I've had a nagging problem for a long time that has just come to a head. My ASUS A7V MoBo system (purchased with WinME installed) has been working OK for four years, but at bootup the drive controllers are "not seen" by the BIOS. That is the Primary and Secondary Drive Controllers display "None" at bootup, even though they are most certainly there and the system boots normally! There are three drives in my system, all different (Ultra ATA with 80-wire cables), two on primary and one on the secondary Ultra ATA Controllers. There are also Primary and Secondary IDE Controllers (four total drive controllers!) on the MoBo, but I'm only using them to handle the CD-ROM and DVD drives I've got. No problem with those --they are seen, reported OK and work OK. I've lived with this (everything's otherwise worked!) until now that I am trying to install Win2K in the system. Not surprisingly it hangs with a Stop Code indicating there is an INACCESSIBLE_BOOT_DEVICE. When I try to load the Promise Ultra ATA drivers when prompted by the Win2K StartUp routine, they won't load because the Controller is integrated into the MoBo. I've kept BIOS and MoBo drivers up to date from ASUS, but that doesn't solve the problem. Somehow I've got to get the BIOS to report "seeing" these controllers and drives that are otherwise working fine. This has me perplexed. Any thoughts? I'll be happy to fill in any other useful details that may be necesary to work this through. TIA.