From what a riend of mine has told me from his install experience yesterday, he had to give the product key like 5 times, install REQUIRES and internet connection for product key checking, and you have to agree to let your computer contact MS every x amount of dyas to check up on you to see if the key is still valid. It's avaliable DVD media only, you cannot share filetypes of .mp3 over a network. If you drag and drop a file to the desktop from a usb key it automatically puts it in a my music type folder , not on the desktop. it's very obtrusive as far as needing the admin pwd for just about everythin you want to do.