I have at present windows home premium 32 bit installed on my computer. I now want to remove it and replace with 64 bit. The two came together with the same product number, When I load 64 bit I am informed it is an not a legall copy due I suspect it is using same product number. Is there any way I can cancel the 32 bit product key and install the 64 bit legally using the same key. My other question if I may, will installing the 64 bit format the 32 bit windows and leave a clean install of the 64 bit windows. Your help gratefully appreciated.