Digital Rights Management (DRM)

The files are protected during copying, which limits which computers the files can be played on. For information about enabling playback on additional computers, see the Digital Rights Management (DRM) page at the Microsoft Web site.
To prevent files from being protected when copied from a CD: For Windows Media Player 7, go to the CD Audio tab of the Options dialog box and clear the Enable Personal Rights Management check box. For Windows Media Player for Windows XP and Windows Media Player 9 Series, go to the Copy Music tab of the Options dialog box and clear the Copy protect music check box.

For information about how DRM is affected if you change the CPU, see the Knowledge Base article at the Microsoft Web site.

If you backed up your licenses, you can restore your licenses. If you did not back up your licenses or if your license store is corrupted, you will need to copy the content again. For more information about restoring your licenses, see "To restore your licenses" in Windows Media Player 9 Series Help.

The DRM system on your computer is corrupted. The problem may occur if you have replaced hardware components in your computer. As a result, existing licenses on your computer may not work correctly, or it may be impossible to acquire new licenses. For more information about resolving this problem, see the Microsoft Knowledge Base article at the Microsoft Web site.

Content that has been protected with DRM cannot be transcoded.