Hello. I wanted to ask a quick question before i buy an oem dvd of windows 7 premium 64 bit. The computer i want to install this on already have windows 7 32 bit (which was also an oem) installed but i want to "upgrade" to a 64 bit so i can have more ram. i already know that i cant use the upgrade option to change it to 64 bit and i have to use the custom settings. I also know that i need a new product key too. the one i am buying should have one with the dvd. Lastly i know that upgrading to 64 bit will cause me to lose all of my files. and i did check my system to see it was compatible with 64 bit and it said it was. Am i missing something important that i should be aware of?