Hi.
I run it under XP, and since the code is pretty darn good, it'll run on almost anything. Including the ~$50 laptops.
A good use for that old computer You can't use for anything else anymore.
While the WinISD Beta is somewhat limited, the Alpha Pro can drive You out of your mind unless there's a
complete parameter file either available on the library, or you can get it from the 'net.
Even if You do get full T/S parameters for an unknown driver, or you measure 'em, inputting that data is a tedious work and more often than not it fails to plot any meningful results. The parameters also have to be
exactly correct, down to the 4th/5th digit, or it just won't work.
Eminence sells a designer program thet they AFAIK didn't write, but just re-brandeded as well, but after a quick try with that I liked Alpha Pro better.
Mainly because of the library.
And because it's free

.
Good luck.
Regards
Sam