I have three music playlists appearing in Windows Media Center which I cannot delete. I have been unable to locate any associated files representing those playlists on the drive or entries in the registry. Other 'net articles have indicated I would find the playlists in the ~\Playlists folder. I did find some there -- removing those from that folder caused all the others appearing in WMC to disappear. But I've not found any thing else that represents these others. On two of them, attempts to delete them prompt for confirmation, click Yes and then back to the UI with no change. On the third, it does the same thing but I get the wait cursor for about 30 seconds before it finally goes back to the UI. Ideas? Other locations for playlists or ways to clear out the WMC playlists?