To AtticAnne.  The issue you are talking about is different.  On Windows 7, and I think Vista, the installers would do their thing then when done an error window would pop with the message that the installer may not worked properly.  This was most likely the result of Windows UAC security/babysitter.  The recent issue is with older installers simply not working.  We Windows people are now in the same boat as Mac people when it comes to old installers.