Ask 12Clicks. Opps, my mistake, I though you were asking for the best adware installer. (Note: This thread and the complaint it is addressing is the result of the use of wonderful "ad supported software" available directly from your friends 12Clicks and Standard Internet.).
Anyhow, the application that most IT departments depend on is Giant Software's product, which was recently purchased by Microsoft, and is now available as a free beta at:
http://www.microsoft.com/athome/secu...e/default.mspx