|As above, if the machine is relatively new, check compatibility with windows 7 and go with that. If it is not, stay with 32bit XP as long as it has the capabilities you need, then go with a new machine for 64bit computing. Currently most programs do not truely use the 64bit environment, by the time they do, your computer will be a few years older and not likely to be up to the task anyway. And as above, XP 64bit has never been supported fully by hardware and software manufacturers. Consider further that XP support from MS will be discontinued next year I believe.|
Conclude: Don't bother --- wait to use 64 bit '7'.