I know viruses uses exploits to gain admin rights to install software. My question is here at work, we have people end up with the Bing Bar installed from time to time on their machines. It is listed in the Programs and Features as an installed programs - which requires admin rights to install.
My question is, all of these users do not have admin rights. How does the Bing Bar install onto the system without admin rights? Surely Microsoft does not use an exploit does it?