You may perform a clean uninstall and reinstall of RealPlayer by following the below article:
Make sure you delete the RealPlayer folders as mentioned in the below article, before reinstalling RealPlayer.
Note: Deleting these folders will remove any playlists you've created; the files will remain in your library but the playlists will need to be re-created.
Regarding burning CD's, follow the steps provided in the below article:
Let us know the progress.