Hmm I think I have found how you should be able to fix it.
The names might not be exactly the same as I say since I have only french versions of Windows, so I provided screenshot to help locating the things according to where the buttons are in the dialog boxes / which icons are present ...
So, I think you should do like this :
1 - Open Internet Explorer
2 - Menu "Tools", "Internet Options..."
3 - Tab "Contents"
4 - Button "Publishers" (or "Editors" or something ... )
5 - select any line containing something about Macromedia or Adobe
6 - Click Delete
7 - Close the dialog boxes with Ok
Screenshot : http://xs413.xs.to/xs413/07125/enleverautorisation.png