The term antivirus software stems from the early days of computer viruses, in which programs were created to remove viruses and prevent them from spreading. However, over the years, different types of malicious software, often called malware, emerged as threats to personal and work computers worldwide. Malware is an umbrella term to describe several different kinds of malicious programs, including computer viruses.
Re: Wheel vibrating, front of truck shaking. Most commonly, if the shaking is in the wheel, then the alignment is off; on the other hand, if the shaking is coming from the seat, then the balance is off. This is the basic rule of thumb for figuring out what one would have checked.
Vibrations in the steering column can happen for a number of reasons, such as a busted motor mount, bent rims, bad CV joints or loose lug nuts [source: Distad]. But none of these automotive problems would cause a steering wheel to shake only when the brakes are applied. That's almost always due to a problem with the rotors. Good question. Rotors are discs that your brake pads clamp down on in order to stop your car. In other words, they're pretty important. Why they may cause the steering wheel to shake when braking requires a quick review of how rotors work.