Consumers need Microsoft Windows Media Player version 6.2 to play the packaged media files. When users try to play a media file but don't have the correct version installed, the player automatically directs them to download the free Windows Media Player upgrade. Once downloaded, Windows Media Player 6.2 checks to see if the consumer has a license to play the media file. Consumers who do not have a valid license are directed to the license registration page on the content provider's Web site. Content providers can charge money or ask for information before issuing a license.
Many sites now request an e-mail address in exchange for clip licenses.
Music companies can then use this e-mail address to keep the fan up to date on concert schedules and new CD releases, or to market related merchandise. Once a user registers or pays, they can then play the downloaded media file without connecting to the Internet. If an expiration date is used with the license, the content will play until the expiration date is reached. Consumers can freely distribute the media files, through email or on Web sites. But because licenses are unique to each user and cannot be shared or copied, each consumer must acquire a license to play media files.