See:
http://www.microsoft.com/windowsvist...s/default.mspx
This will explain the versions.
Larry
"wdw2020" <wdw2020@discussions.microsoft.com> wrote in message
news:C85BBC3B-89C9-4C5B-856E-8396DA273AC2@microsoft.com...
> im mean they have 4 different ones what the difference and which one is
> better