I bought a new dell computer with windows home premium(english) installed on it.
Now i have bought a legal and official licence key of vista ultimate (because i need some functions of ultimate(dutch)). I also have a DVD with which I can install all types of vista (32 bits).
Now my question is:
Can I upgrade my home premium to ultimate without reinstalling all my apps,... by having an official lisence key?
How do I have to do it?