At some point during a software installation, a small prompt appears asking you to choose between a 32-bit and a 64-bit version. You probably either guess, panic-Google, or pick the bigger number and ...
Or is there no difference at all? I have some admittedly low end hardware, a pair of Netbooks that I have hooked into a large monitor. Both are Intel Atom chips. N270 'Diamondville' single core 1.60 ...