Computer crime is a category of offenses that you could be accused of if a computer was part of a criminal act you were or allegedly were involved with. Sometimes, computer crimes are named similarly to crimes that don't use the computer. For instance, fraud can be computer or Internet fraud, or it can simply be fraud.
Computer crimes can involve several kinds of acts. For example, if you introduce a virus to a computer, then you can be accused of a crime. If you use a computer to defraud someone, like if you decide to steal someone's identity, then that's a computer crime as well. Taking data, copying programs, falsifying emails, or stealing information services are all kinds of crimes that can lead to charges.