PDF - The rebel icon type.
The programs having a msi based installer stores its icon (as an exe file) and uninstaller in C:WindowsInstaller. It is difficult to change the icons for those programs. Some of those programs are:
Microsoft Securities Essentials
The problem is that I never give up until a found a solution. So digging in the web I found an app that help to change FILETYPE icons. Its name is "FileTypesMan"
Here is the website to download the version depending of your system (Windows 32 or 64 bit).