If you do patch test/analysis/diffing, you might find this tool
handy. This tool will automatically extract all the *.msu files,
and then you can search for the patched files you're looking for
quickly.
The workflow would be something like this:
1. You download the patches from:
http://mybulletins.technet.microsoft.com/BulletinPages/Dashboard
2. You put all the *.msu files in one directory.
3. Run this tool: extract_msu.bat [path to *.msu files]
4. The tool should extract the updates. After it's done, you can
use Windows to search for the file(s) you're looking for.