A computer virus is specificallywritten, small-sized program attached to other applications. At startup, a malicious utility can clog RAM, download unwanted modules, block access to sites and perform a number of other unwanted actions on the PC. Users often do not even think about the fact that infection with a computer virus can occur during normal work with files.
The application, inside of which is maliciousthe code is infected. When such a utility is launched, the program gets control of the virus. In order for a user to not detect a malicious code, actions to infect other applications can be performed only if certain conditions are met.
The virus has the ability to reproduce itself.This feature is inherent in all types of malicious tools. The virus uses the codes of other applications, data about the file structure and even the names of programs. In this way, the management of the malicious utility is transferred.
How do these programs get into the PC?Infection with a computer virus can occur during the download of an application from a disk containing malicious code. You do not need to run the utility. It is enough to restart the PC, forgetting to remove the removable media. At this point, the virus will enter the system.
It is very easy to infect a disk.It is only necessary to insert it into the optical drive of the infected PC and read the table of contents, as the virus immediately gets on the removable media. Malicious programs can infect a PC not only when using a removable drive, but also when downloading and processing files, installing an infected operating system.
It happens that the user views inbrowser emails and suddenly discovers on the PC the results of the malicious program. However, the drive is empty, and other applications are closed. How does the malicious code get into the PC? Infection with a computer virus can occur while working with the Internet.
Along with e-mails, oftenattachment files are sent. Through them, the virus enters the PC. Messages sent in HTML format often contain links to malicious programs on the Web. In some cases, infection with a computer virus can occur while reading the message itself. When you view the message, the malicious code is activated.
Once on the PC, the virus extracts contact addresses from the mail program. Then he sends his code to other users. With this method, the virus spreads quickly over the Internet.
