When I right-click in My Computer it says I am running Windows 7 Enterprise, just as I thought. For some reason, if I go to the Help menu inside of the Roxio Creator Silver 10 program and select "About" it says I am running Windows Vista. I'm not saying the program was pre-installed in the sense that at very first boot up it was already installed. I'm saying it was pre-installed for MY first use of the system (our systems are refreshed ever 2 years so they are upgraded to the latest Windows OS and business-related software is either installed or updated). I've had this system for a year or two and I'm just realizing the program has been on my system this entire time so I'm giving it a try as I burn dozens of discs per day as part of my daily responsibilities.