COMPUTER VIRUSES AND VIRUS PROTECTION PROBLEMS A.V.Kabulov anvarkabulov@mail.ru I.K.Yarashov timprivate345@gmail.com M.T.Jo‘rayev jorayevmaruf007@gmail.com National university of Uzbekistan Abstract: Computer viruses are the most pressing problem of many today. Computer virus remains one of the reasons for the loss of information and the main thing. It is known that viruses have led many organizations and companies to disrupt their work. A computer virus is a specially written program that can be attached to other programs (that is, it performs its performance), as well as perform unwanted actions on the computer. The Virus does not always carry out actions to infect the software in order to hide itself. They are realized only under certain conditions. The fact is that viruses use all sorts of ways to get rid of attachments to their systems, so there are no systems that do not get infected. Computer viruses, along with their characteristics, working, effects on the computer systems and to suggest measures for detecting the virus infection in a computer system and to elaborate means of prevention. Keywords: computer virus, virus, trojans, logic bombs, network. Introduction Think of a biological virus – the kind that makes you sick. It’s persistently nasty, keeps you from functioning normally, and often requires something powerful to get rid of it. A computer virus is very similar. Designed to replicate relentlessly, computer viruses infect your programs and files, alter the way your computer operates or stop it from working altogether. Some computer viruses are programmed to harm your computer by damaging programs, deleting files, or reformatting the hard drive. Others simply replicate themselves or flood a network with traffic, making it impossible to perform any internet activity. Even less harmful computer viruses can significantly disrupt your system’s performance, sapping computer memory and causing frequent computer crashes. Main part Currently, a computer virus has the following characteristics the program code is: • the ability to create copies that do not have to match the original, but have the characteristics of the original (self-restoration); "Science and Education" Scientific Journal December 2020 / Volume 1 Issue 9 www.openscience.uz 179