Good Gear Guide
In Pictures: How to spot and avoid installing pote...
Disarm the trap
Look what you get when you select Custom installation! You get options, already checked, not only to install the toolbar, but to let it take over your browser's Home and Search settings.
Is that why you're installing a DVD-to-ISO ripping tool? I didn't think so.
Obviously, you need to uncheck those options before you continue.
In Pictures: How to spot and avoid installing potentially unwanted programs