Recently I noticed I can't actively play any .wav or .mp3 files. Sound still
function, I can move the volume slider and hear it, windows start up sounds
etc, but nothing in Windows Media or other players. Usually the error is a
generall Access Denied "You've encountered error message C00D11D2 while using
Windows Media Player." So of course I have checked permissions and even gone
so far as to make sure "Everyone" has full control. I suspected Indexing had
the file(s) locked so I even tried something on the network, but always get
the same file. Even get the same error when playing default Windows sounds
in C:\Windows\Media I can play the .mid but not the .wav Any Ideas? I'm
stumped!

Solution Found:

UPdated system BIOS > No Luck
ReInstalled Audio Driver > Fixed problem

This was a very strange problem because the audio of the system still
funcitoned and .wav files could be heard (system startup sound, email
notifications etc etc) but no .wav file or mp3 would play. They would alway
get access denied.