Lets pretend for a moment that I buy a 64 bit hardware setup. AN Athlon 64 setup and some Asus board to accompany. Whatever.
Will I need to purchase a 64 bit operating system, such as Windows XP 64 bit edition? Or will I be able to continue to use my older home edition. I don't care if it won't be taking full advantage of what 64 bit has to offer, just as long as I can still run whatever. I may purchase winXP 64 bit in the future, as I think Solidworks would benefit from it. That's for another day