To automatically play DVDs when you insert them

Windows Media Player banner art

On the Tools menu, click Options, and then click the File Types tab.
In File types, select the DVD Video check box.

Note Image Notes

You must be logged on as an administrator or a member of the Administrators group to complete this procedure.
To play DVDs, you must have a DVD-ROM drive, and a software or hardware DVD decoder installed on your computer. If you do not have a compatible DVD decoder installed, DVD-related commands, options, and controls do not appear in the Player and you cannot play DVDs. By default, Windows does not include a DVD decoder. For more information about DVD decoders, see Windows Help.
This feature is only available on select versions of Windows. For more information, see Special features.