You can by installing windows xp pro x64.The only problem is mainly printer drivers that some companys haven't made yet,like cannon for an example.Otherwise it is good for a power user with video and other media and allows running multiple programs.Or wait until vista. Vista is also like the x64 it states that some firewalls and other apps may not work but it uses the same concept of windows on windows.itwoun't allow you to upgrade you have to have a fresh install.I have it, but I'm going to wait to install it because I need to find a 64 bit driver or windows server 03 driver for my printer.
