That error seems to usually be associated with SATA/RAID harddrive
controller issues.
This thread had a solution that might help:
http://www.annoyances.org/exec/forum...sta/1204991239
"Tom" <> wrote in message
news:5A6AEC0C-A094-4FAD-ABB9-...
>I tried to install an Apple Cinema monitor on a Gateway computer runing
> Windows Vista O/S. When I power up the computer the screend stopped
> during
> the boot up and said the AHCI Bios were not installed. I changed the
> video
> card from a NVIDIA 8500GT to an IMAC video card and still had the same
> issue
> (AHCI Bios not installed). The Apple Techs said the monitor has no
> problem
> running Windows Vista. I tried the Apple monitor on a cheap emachine
> running
> Windows XP and had no problem. Gateway said it is a third party issue and
> they will not provide support, buy another monitor. Any ideas what I
> could
> do about the error message to make my computer compatible with the Apple
> Cinema monitor? My system is a Gateway, Intel Core 2 Quad Processor
> Q6600,.