It was made in 2000, so it does not really say, It does require about 350 MB for the recommended install, which I actually did on my computer, which is currently running Vista. I know it will work up to XP, with no problem. It appears to work on Vista okay, with some modifications available at Microsoft, according to the answer windows gave me. I did not register it, just wanted to see if it would install and run in Vista and it does on first glance.