Hi. I have a original disk of windows vista business upgrade. Two weeks ago I
intalled over a windows xp. No problem at all.

Yesterday I hard disk died. Today I intall the same original windows xp and
I try to upgrade to windows vista, but a error appears tells me that Vista
must be installed on c omputer that supports ACPI.

Well, Vista was right, on by BIOS setup I had ACPI disable. My mistake. But
I already Enable it. I tried aain to upgrade to Vista but the same message
returns.

Do I must install XP with ACPI enable and only then upgrade to Vista???

Do I need to format the computer again?

Regards,
Marco