Windows Vista Upgrade Planning
http://www.microsoft.com/windowsvista/getready/upgradeinfo.mspx
Windows Vista Editions
http://www.microsoft.com/windowsvista/getready/editions/default.mspx
You can upgrade from Win 2K Service Pack 4, XP Home, and XP Pro, and XP X64.
XP Pro 64 Bit only comes through Volume Licensing or OEM purchases of
course--at least legit purchases. Win 2K was only released as a 32 bit OS.
As Colin has stressed multiple times, you aren't going to be able to upgrade
cross platform or whatever term Colin likes better for this, i.e. you aren't
going from a 32 bit previous OS like Win 2K or Win XP to a 64 bit Vista.
This is not going to happen--at least via sales from Microsoft.
If you want to end up with 64 bit Vista, you are going to need a 64 bit CPU
and the only software you can upgrade from is 64 bit XP. You cannot start
with X86 and upgrade it to 64 bit Vista. You will be able to go from one
edition to a more expensive one with more features if you have 64 bit Vista.
MSFT has told me on Thursday December 14, 2006 that all edition changes will
be handled at the original source, not through their web site
Please Keep in mind the following obvious points:
You can upgrade from Win 2K Service Pack 4, XP Home, and XP Pro, (and both
must have SP2), and XP X64.
XP Pro 64 Bit only comes through Volume Licensing or OEM purchases of
course--at least legit purchases. Win 2K was only released as a 32 bit OS.
As Colin has stressed multiple times, you aren't going to be able to upgrade
cross platform or whatever term Colin likes better for this, i.e. you aren't
going from a 32 bit previous OS like Win 2K or Win XP to a 64 bit Vista.
This is not going to happen--at least via sales from Microsoft.
Colin has posted some minor changes in functionality with X64, and Office
2007 but I view those as temporary minor growing pains that will be fixed
quickly.
Any questions for more detail can be directed to 1-800-MICROSOFT.
CH