On the VCP homepage: http://www.jtow.net/users/triess/ ...are two versions: 4.5.0 (VCP) and 1.3.0 (Vista Codec x64 Components) I have Ultimate x64; the question is do I need VCP 4.5.0 and the 1.3.0 x64 components as well, or just the x64 components, or what? Not clear what should be installed for a x64 machine with Ultimate x64 OS. And another question is how do you remove (uninstall) the current codecs I have now before I install VCP? I am attempting to fix this problem exhibited here: Below is normal, from WMV file. This is from an MPG file. Not normal. The circled are MS default dreamscene files and these are MPG files. The rest are OK and are WMV files. Edited to add this: This is the current list of codecs from WMP: A section of above made larger: