I have a computer with a BIOS that doesn´t support ACPI. I tried to install Windows 8 but the setup said I cannot install Windows 8 without ACPI. After some research I found out that this is since Vista.
Is there any option to install Windows 8 even if the BIOS doesn´t support ACPI?
No.
Windows used to support APM (and you could in fact even force a specific HAL version at install time), but with Vista they dropped it. Build 5048 if you want to be specific.
Anyhow, if your system is so old not to support ACPI, I'm really doubtful it could even meet the other minimum requirements for W8 (namely SSE2 and NX bit). Nevermind.
