i was just needing to know if i take a blank hdd and put 32-bit windows vista home basic on it and then a month later i buy an OEM of 32-bit vista home premium, will i be able to install the OEM over the retail disk installed (not wanting to dual boot)? i dont want to keep home basic but its the only retail (reusable) OS disk i have and i would like to have home premium. im building/buying a pc today and tomorrow but i dont have the bank to get the OEM vista premium so i have to use a retail vista basic until i can get the cash. thanks for any help/advice before hand