How do I remove dead entries (for files that don exist) from the Media Library?
If and only if you are using WMP8, use the Media Library Management Wizard that’s included in the PowerToys. Note that the Media Library Management Wizard is not compatible with Windows Media Player 9 Series. Per Sean: “The Media Library Management Wizard has “grown up” and has most of its functionality now built into Auto Info in MP9Series. Check out Tools|Options|Media Library and check Rename and rearrange music.” There’s an official MS article here about cleaning up old entries. I started writing a minor PowerToy that cleans up invalid entries – you can use this app for WMP7 to do this. Note that this powertoy is fully unsupported and was still in a preliminary stage of development when the source code got destroyed due to a hard drive failure. Please do not distribute this. If anybody wants it, have them get it from here with the warning I put here.