What is badware?
According to their site:
"There are several commonly recognized terms for specific kinds of badware - spyware, malware, and deceptive adware. Badware is malicious software that tracks your moves online and feeds that information back to shady marketing groups so that they can ambush you with targeted ads. If your every move online is checked by a pop-up ad, it's highly likely that you, like 59 million Americans, have spyware or other malicious badware on your computer.
What's particularly tricky about badware is that you may not know that you downloaded it. "
Read more here.