Help me Undo a Tweak

[edbro]

I need help identifying a tweak I must have applied that disabled XP from reading tag information from MP3 files. I need to get this back but I can't figure out what would have disabled it. If I can identify what reg setting disabled it I can recover it because it works fine on my wife's computer. I'm hoping somebody can identify what reg tweak it is and I will export that setting from the good computer.

I first thought it would have been the following but it doesn't seem to be the case:

; Disables Preview of Movie file formats (allowing you to move/rename/delete without errors)

[-HKEY_CLASSES_ROOT\.avi\ShellEx]
[-HKEY_CLASSES_ROOT\.mpg\ShellEx]
[-HKEY_CLASSES_ROOT\.mpe\ShellEx]
[-HKEY_CLASSES_ROOT\.mpeg\ShellEx]