Windows 7: Missing Albums

Hi Everyone



I recently downloaded some tracks and they were put in my Music Library. They showed up in Windows Media Player just fine, but next time I started my computer, they had disappeared from Media Player. They are still in the library and I can get Media Player to play them, but they don't/won't show up in it's window.

I've tried deleting and re-setting the default libraries and repaired the Windows Live programs to try and remedy this, but to no avail. I've created Playlists with the albums concerned and the music plays fine that way, as a workaround.

Can anyone help me get these albums to appear in Media Player?

Thanks