I have yet to get this program to run; I have tried it on several different computers running windows xp - an hp and a emachines; both have pentium processors and 512 k ram; when the program crashes, it brings down then entire xp operating system! use at your own risk; this is not functional software unless your computer does not used shared memory for video, there are no patches or support updates for this problem, and you have to dig deep into broderbunds site to get a clue as to what's going on; I'm sticking with version 3, as weak as that was