Only retail and OEM versions of Windows XP will
qualify for the upgrade version of Windows Vista.
In your case, you could perform a "clean install"
of your original Dell Windows XP Home Edition,
then upgrade to Windows Vista with the upgrade
version.

--
Carey Frisch
Microsoft MVP
Windows Shell/User

---------------------------------------------------------------------------------

"Reg and Ruth" wrote:

| I have a 1 year old Dell desktop which was supplied with an OEM version of
| Windows XP Home. I subsequently upgraded to XP Pro with an Academic Upgrade
| version. Will I be able to upgrade to Vista with a Vista upgrade version, or
| will I have to buy a full retail version and do a clean install?
|
| Many thanks for any help.