Pick your answer from:
(a). Some of the more commonly known viruses include : File infection virus boot sector virus worms trojan horse Identify whether or not you have a virus. There can be a number of reasons besides viruses as to why your computer has slowed down, frozen, or is doing strange things..
(b). Viruses are usually created by innocently browsing the internet as a way to get older files ready for future use. Perform a search for windows users to see which programs they use..
(c). If a virus is trying to come from somewhere other than your computer, but is still trying to get to you, there is a good chance that the virus is going to be harmful. Viruses that are not well researched as they can very easily be passed to friends and family..
(d). These viruses are often spreading too quickly, even if you are not sure when they have started as viruses. They include: triplet, sypeel, malwarebytes, and ivirus..Choose from options above and answer: What most naturally follows?

How to deal with computer viruses
Understand the types of viruses possible.
There are plenty of viruses being transmitted through software and from online and some are more detrimental than others. In addition, there are plenty of viruses yet to be thought up, so being aware and prepared is better than trying to cure them.
Answer:
(a).