Vista ultimate or premium?
I have xp pro on one of my machines and want to change to vista but I want to know if premium is worth it or should I go with ultimate? I have ultimate on my main machine and love it. My only reason is that I have a vista home premium disc that I have and it is fully legal but was wondering what the main difference would be. I seem to find it is very similar except for remote desktop which I think is important because I am networked. What would you do?

Look here for the answer to your question.

While Vista Home Premium is plenty for most users, beware that you *cannot* upgrade from XP Pro to Vista Home Premium, as XP Pro is a corporate/business product and Vista Home Premium is a consumer product. Therefore, an upgrade license would NOT be valid for you. A Vista Business upgrade license would work, but it does not have the extra media features that a home user might want. I would advise either buying a Vista Home Premium OEM license, unless you specifically need some feature of Ultimate that Home Premium does not have. Home Premium does not have some of the features of XP Pro such as joining an active directory domain, group policy editor, etc.