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I have a home theater computer running Windows 7 and WMC. It is a fresh install from 5 days ago, fully patched/updated, though I have not installed WMP 12.

All my music is in a second hard drive (D:\Music).

I share D:\Music with my network which consists of two Mac OS X 10.6 laptops.

I purchased a new album on iTunes (BT's These Hopeful Machines for those curious :)).

Only three of the songs from the album (track 2, 5 and 8) appear in Windows Media Center or Windows Media Player. The songs are M4A format. All the songs in the album play just fine if I double click them in Explorer.

The folder (D:\Music) is in my Media Center/Player library for Music.

Why don't the remaining songs show up? I can play them, they just won't get added to the library. I do have other albums that have this problem, but this is the most recent and I imagine the symptom is common between them.

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up vote 1 down vote accepted

Well, apparently its an easy fix.

  1. Close WMP/WMC.
  2. Stop the Windows Media Player Network Sharing Service (ensures all files are open).
  3. Delete all the files in C:\Users\MyUser\AppData\Local\Microsoft\Media Player\
  4. Start the WMP Net service.

Start up WMC again and I can see the files that were previously missing.

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