My windows media player is saying:
indows Media Player cannot find the file. If you are trying to play, burn, or sync an item that is in your library, the item might point to a file that has been moved, renamed, or deleted.
Does the file exist? Browse to ensure it is real, then add the desired file location to the respective 'library' (Photo, music, video, etc...).
Open up Windows Media Player (not media center) and delete all your entries, when prompted do not remove the actual file just the library entries.
Have media player update it's library. After the search and find, It should fix your problem.
2. Stop the media sharing service.
Go to Start->Control Panel->All Control Panel Items->Administrative Tools->Services. Right-click on the “Windows Media Player Network Sharing Service” and select Stop.
3. Navigate to “c:\Users\”your username”\AppData\Local\Microsoft\Media Player. Now delete the files named CurrentDatabase_***.wmdb and LocalMLS_*.wmdb.