- If Windows Media Center is running, close it.
- Click Start

- In the Start Search box, paste or type regedit.
- In the Programs list, click regedit.
If you are prompted for an administrator password or confirmation, type your password, or click Continue. - Locate and then click the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Media Center\Settings\DvdSettings - In the details pane, right-click ShowGallery, and then click Modify.
- Delete the contents that appear in the Value data box.
- In the Value data box, type Gallery, and then click OK.
- Close Registry Editor
How to enable the DVD Library in Windows Media Center on a Windows Vista-based computer
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