I tried installing Microsoft codecs for MWP 6.4. I downloaded the installer straight from Microsoft's website.
The installer is Windows NT4 compliant.
The installer loaded most of the codecs. I can now play avi, wmv, etc. However the installer will not load Windows Media ISO MPEG-4 V1.1 DirectShow Codec or Microsoft Windows Media Audio Voice 9.
I only care about MP4 and MOV files.
The installer creates a Code Download Log entry. "Code Download Error: (hr = 8007007e) The specified module could not be found."
This is a non-internet computer.
Restarting the installer shows that these two codecs are the only two hold-outs.
Curiously, when I click on setup_wm.exe 7.01.00.3055 Microsoft Windows Media Configuration Utility - which comes with the codecs - I get the following message: "Windows Media Configuration Manager: Setup has detected that you are attempting to install Windows Media Player on an unsupported version of Windows. For information about system requirements or Windows Media Player, see http://www.microsoft.com/windowsmedia. Setup will now close."