twice install

i plan to upgrade to vista ultimate from xp home. do i need to do this twice
installation everybody is talking about? can't i just install it and expect
the sytem to switch over; without a clean install, keeping my files and
programs.

just to add on i plan to upgrade

"gehan" wrote:

> i plan to upgrade to vista ultimate from xp home. do i need to do this twice
> installation everybody is talking about? can't i just install it and expect
> the sytem to switch over; without a clean install, keeping my files and
> programs.

http://support.microsoft.com/kb/932616
says that you can upgrade xp home to Vista Ultimate,
that a custom installation is unnecessary for that.

"gehan" <gehan@discussions.microsoft.com> wrote in message news:4B834594-5034-411E-BF14-8A98572D0C73@microsoft.com...
> just to add on i plan to upgrade
>
> "gehan" wrote:
>
>> i plan to upgrade to vista ultimate from xp home. do i need to do this twice
>> installation everybody is talking about? can't i just install it and expect
>> the sytem to switch over; without a clean install, keeping my files and
>> programs.

"gehan" wrote:

> i plan to upgrade to vista ultimate from xp home. do i need to do this twice
> installation everybody is talking about? can't i just install it and expect
> the sytem to switch over; without a clean install, keeping my files and
> programs.