A lot of people download stuff and just keep clicking next until it's set up only to find 10 other things have been added to the programs that they don't what to do once they notice all the garbage on their machine. When downloading they have a preferred setting and a custom setting. By selecting the Custom Setting allows you to remove the check mark from the boxes so that product doesn't get installed. There is the odd product that will install features whether you remove the checkmark from the box or not. It still installs. Worst I have seen for that is products from Whitesmoke Toolbar. You get the Toolbar and a lot of unwanted crap that goes along with it because they don't have a custom installer that lets you choose what you want installed.