Win 2000 upgrade

ACPI is a power saving feature in the Bios of your machine.

if Windows 2000 and XP are installed on Machines that have broken ACPI
tables or too old Bios than they will be installed as APM only, not ACPI -
that is the Way 2000 and XP then handles all your power-configuration.( can
also happen "by accident" if you press F5 in 2000/XP setup and choose
"Standard PC" ).

So Vista inside 2000 or XP does a check if Acpi is enabled, becasue Vista
does not work with APM like it was possible with 2000/XP.It simply refuses
to install.

As your Bios HAS indeed ACPi and you do a clean install, then Vista sees it
right from the Bios and not from a running OS that may report things wrong.
Inside 2000/XP it gets the information that YOu d not have.

2000/XP can afterwards be forced to make use of ACPI instead of APM but that
is very tricky and it can happen that you must reinstall 2000 or XP if it
goes wrong.

Anyway, a clean install is always better. Remember that 2000 is NT 5.0 and
you now do the jump to NT 6.0 which is a major step.. :-)

It has nothing to do with your licenses or Productkeys.

SJ /germany

"dongdahanoi" <dongdahanoi@discussions.microsoft.com> schrieb im Newsbeitrag
news:0E84F9C3-FF7A-4031-83B9-288C3087EF34@microsoft.com...

>I have a win 2000 developer edition to which i would like to UPGRADE to
>Vista
> Ultimate, after installing all service packs to sp/4 I tried to do a
> UPGRADE
> to Vista
> from the Win2000 GUI, after awhile it comes up with a "unable to continue
> upgrade as your Your ACPI feature has not been enabled can not proceed any
> further".
> As I triple checked this feature I then proceeded to do a clean install of
> Vista and had no problems at all
>
> Why does this error only show in the upgrade and not in the clean install?
> why can I not proceed any further to the CUSTOM INSTALL feature?
> Can I retain my Developer llicence and transfer it to my Vista Install,
> or
> would I need another product key for a clean install?
>
> regards dongdahanoi