Hi,
mmcraig, and welcome to the forums.
I think you're missing an update somewhere - for example SP1....
My version is 11.0.6001.7000....
If you're hellbent on not installing SP1, then all I can suggest is to uninstall *all* codec packages that you might have installed, reboot into Safe Mode, then run SFC /SCANNOW, then reboot, then install
Vista Codec Pack - 32bit & 64bit Media Player Codecs as you *only* codec package (note, there are two parts, the standard Vista Codec package, and the x64 components, which you install *after* VCP).