Hi, looking for some advice. I have a Retail version of windows 7 Home Premium which I've been running as 32 bit for some time now and have decided to upgrade my system and want at the same time to change to 64 bit, my questions are, can I reinstal from the same disk and select 64 bit and will I be able to backup my data in 32 bit and load it on to the 64 bit installation. Hope this is clear enough to get your advice, regards, Jack.