So I have read that it is cheaper to purchase the upgrade option of Win 7 as opposed to the full version. My question is what happens down the road when you may have to perform a reformat or re-install? Do you have to go through the steps of installing your original OS first be it XP, Vista, or whatever (I have read that you can do the upgrade from a registered Win 7 beta as well, not sure if it actually works or not) and then activate it and such before performing the next step and installing the 7 upgrade? As that would be a huge pain in the rear? Just curious.