Vue 3.1 is a version back, but it's only about 1.5 years old. I have a friend that runs this version and he has no problems, but he is running XP Pro and I am running XP Home. It shouldn't make a difference, but you never know...it might. Anyway, I've decided to upgrade my software anyway and everyone assures me that Vue 4 does indeed run under Windows XP :). No big deal :). I should have the latest version of the software anyway since I'm a moderator for the Vue forum at www.big-i.com ;). At least I can say I've tested the older version on Windows XP!...LOL. Laurie