A computer virus is a type of malicious software that is designed to spread from one computer to another and cause harm to the infected system. That harm used to be innocuous humour that caused some temporary inconvenience, such as a silly picture on your screen that disappeared after a minute. In recent years, computer viruses have become increasingly sophisticated and dangerous, capable of stealing sensitive information, encrypting files for ransom, and even disrupting entire networks. This is because some people have realised they can get money from such activities. The latest computer virus to make headlines is called "RansomEXX."