If you have ever looked at a media file (audio or video) in explorer on a Windows 7 PC, you may have noticed that it displays additional information about that media file that previous versions of Windows didn't seem to have access to, for example the length/duration of a Quicktime Movie Clip.
Microsoft has violated the holy rules of COM and broken their msado15.dll. The violation occurs after the installation of Windows 7 Service Pack 1 (version 6.1.7601.17514).