They probably haven't updated the specifications since the advent of Windows 8; I'd try it before worrying much more. If it really won't work, then you can probably "downgrade" to Windows 7 (which I actually like better) by wiping out the old system on one of your machines and installing it from a disk, assuming the machine is compatible with it. Here's some information on doing that, from an Australian perspective: Where can I get Windows 7? - BIT