What are some of the ways that a computer or business can be infected with a computer virus?

on a website that is illegal or anything that can cause a virus

Explanation:

A way a computer or business can be infected with a virus is via a USB. A person can come into the business with a copy of a C.V. which is destroyed in some way. You give the USB to the receptionist and ask to print you a new one. When they do, a virus hidden in the USB will begin to attack the computer. Another way to infect a computer with a virus is to upload it in a comment box. If a website has a comment/complaint section, a hacker can put in code to a virus. This virus will enact itself once the user opens the website. A fake anti-virus program will appear, and the virus will begin installing itself.