My "server" is a Dell Latitude E6410 with an Intel i5 and 8GB Ram. We run three other machines: a Dell with Vista, a Dell with XP, and a Mac/Parallels with XP. I checked with the elves at AC tech support and they advised waiting till 6.10. I have downloaded v6.09 onto my wife's Dell laptop at home which has Windows 7 Home. It works fine--but the eRx isn't active.