Windows 7 32 bit

What do you mean existing files? Your files yes, you will need to re-install Windows and all your programs though. Just copy your files to an external drive or something.

Best way to do this is going to be to get an external drive. borrow it or buy one from a local or online business.

Do a fresh install of windows 7 64.

I dont think you can "upgrade" from 32 to 64.

This topic has been moved from the section Opinions and Experiences to section Windows 7 by Pyree

you cant "upgrade" nor would you want to upgrade is the worst thing ever

backup and important files (docs emails favourites photos music etc) to another pc/hdd/ext hdd then install 64-bit

if you dont have a 64 bit dics you can download and burn one online and use your existing product key (100% legal) http://www.mydigitallife.info/windows-7-iso-x86-and-x64...