Today on (Jan 31, 2023) in the presence of the head of departments and lecturer a symposium entitled (Computer viruses, what are their models and how they work), was presented by the Assistant Lecturer (Mr. Bilal Hikmat) from the Computer Science department, Where it has been explained about A computer virus is a small program that is entered into a computer without the user's knowledge in order to destroy some or all of the programs and hardware components of the computer. Through your use of the Internet and the computer, the risk of exposure to computer viruses increases, and sometimes these viruses stop them before computers can boot. Internet viruses often spread through attachments to emails or instant messaging messages;  And for this it is necessary. At the end of the symposium, a set of questions and answers were raised on this subject