Check for Windows Updates and let me know which KBs are available to install.
As an aside, could you or someone else brief me on the process of pulling the files from a good computer? I see the Trace:: command which seems helpful if a file doesn't immediately identify a package, but I'd assume there's a utility which can collect all the necessary files from a known good source. Or perhaps this is a question for a PM?
Honestly Trace:: is one of the only ways to identify the package if it's not known. If you are lucky enough to have another machine you can do a quick batch file with some copy commands. If you know the KB number we do have some tools to make it a little easier but overall it's not as easy as it may seem.