Help-Need to Upgrade from Home Premium

I'm starting Law School in a month and we are required to have either Vista Business or Vista Ultimate.

Currenlty I have a: Dell Studio 1537 wit 4GB of RAM and a 64-bit Operating System. It is a Windows Vista Home Premium.

I do not understand much about computers so trying to purchase the upgrade is becoming very overwhelming for me. From what I understand, even if I purchase the upgrade directly through Microsft (even though its like $70 cheaper on Amazon) I will not receive the version I need. I instead will have to go to a website that will not work to try and order the 64bit version.

PLEASE HELP direct me to what I need. Also please remember that this is all very confusing to me!

Hello Udsl12,
I would think the easy way would be to buy OS you want, either Business or Ultimate, save all your files you want to keep to disc, then do a clean install of the Vista you decide on. That way you get it cheaper and have the benifit of a clean install.
Hope this helps, if you need anymore help just ask.
Post your results and let us know how it goes. Good luck at Law School.