If an installer tries to give you "offers" and attempts to install other programs (even realtime trying to install google chrome!!)
Here is what you do:
1. Look for the button that stops the installer. Usually a "Cancel" button or the X button.
2. Place your hand on the mouse.
3. Quickly move your hand so that the little cursor on the screen moves over either one of the buttons.
4. SLAM that left mouse button until either the installer stops or a message box comes up.
A. If the message box asks for more offers, well thats handicapped.
5. If the message box says "Are you sure you want to cancel" or anything along those lines, click YES.
6. Don't download any program from download.com or any site that fills its "installers" with adware.