A:Answer I have the software installed on two desktop computers and it works without a hitch, I just don't think the programs can be used at the same time with the same key. In other words, if the desktops and/or laptops are running the program at the same time as each other it won't work, but you can have it installed on an alternate machine, register said machine with pinnaclesys.com, and use the program without any issue.