I currently have 32 bit, but I want to upgrade to 64 bit. I bought Windows 7 about a year ago, the digital version. I was wondering how I can get from 32 to 64 bit, do I have to do a complete wipe and reformat with 64 bit? If so, is there a clear cut option when reformatting to choose 64 bit? I don't remember seeing anything last time I reformatted.