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Topic: "Computer viruses and protection against them."

Lesson objectives:

1... To form the concepts of "computer virus", "antivirus programs", to give an idea of ​​the types of computer viruses, to acquaint with the means of protection against viruses.

2.Develop logical thinking, memory, attention.

3... To educate students to be accurate when writing in notebooks, cognitive interest in the subject.

Equipment: multimedia projector, presentation, PC.

Lesson type: lesson in assimilating new knowledge.

Teaching techniques: story, conversation, explanation, slide show.

During the classes.

1. Communication of the topic and purpose of the lesson, self-determination.

2. Assimilation of new knowledge.

How do you understand what computer viruses are?

Computer virusIs a program code embedded in another program, or in a document, or in certain areas of a storage medium and intended for unauthorized actions on a computer. These are programs that can "multiply".

After infecting a computer, the virus can become active and start performing harmful actions to destroy programs and data.

The main types of computer viruses:

1. File viruses - These are blocks of program code embedded inside other application programs. The virus code runs when the program starts.

2. Network viruses - they can transmit their program code over computer networks and run it on computers connected to this network.

3. Macro viruses - Infect documents executed in some application programs (for example, Word). Infection occurs when a document file is opened in the program window, unless the ability to execute macros (macros) is disabled in it.

The greatest danger is posed by network mail viruses. A virus infection can occur while viewing a message.

Stages of the virus:

Reproduction- the viral code can reproduce itself in the body of other programs.

Virus attack- after creating a sufficient number of copies, the software virus begins to carry out destruction: disruption of programs and OS, deletion of information on the hard disk, the most destructive viruses cause formatting of the hard disk. Some viruses can destroy data, in which case a chip replacement is required (although it is believed that no virus can damage the PC hardware).

Protection from computer viruses

There are three lines of defense:

·         preventing the entry of viruses;

·         prevention of a virus attack if a virus has entered the PC;

·         preventing destructive consequences if an attack occurs.

The main thing- backing up the most valuable data. In case of loss of information, the hard disks are formatted, the OS is installed from the distribution CD and all the necessary programs, and the data - from the backup media (which must be stored separately from the PC). It is recommended to store all registration and password data for Internet access not on a PC, but in a service diary in a safe.

AidsAre antivirus software and hardware.

Hardware:disabling the jumper on the motherboard will prevent a virus, intruder, or careless user from erasing the BIOS chip.

Antivirus programcompares program codes with viruses known to her, which are stored in her database. Database update - 2 times a month (at least 1 time in 3 months).

In order to combat computer viruses, it is necessary to use antivirus programs.

Antivirus programs.To detect, remove and protect against computer viruses, special programs have been developed that allow you to detect and destroy viruses. These programs are called antivirus programs. Antivirus software compares program codes with known viruses that are stored in its database. Database update - 2 times a month (at least 1 time in 3 months).

Norton AntiVirus 4.0 and 5.0(manufacturer: "Symantec")One of the most famous and popular antiviruses. The virus detection rate is very high (close to 100%). The program uses a mechanism that allows it to recognize new unknown viruses.

Dr.Web(producer: "Dialogue Science")Popular domestic antivirus. It recognizes viruses well, but there are much fewer of them in its database than other antivirus programs.

Antiviral Toolkit Pro(manufacturer: "Kaspersky Lab").This antivirus is recognized worldwide as one of the most reliable. Despite its ease of use, it has all the necessary arsenal to fight viruses. The heuristic mechanism, redundant scanning, scanning of archives and packed files - this is not a complete list of its capabilities. (Slide 3).

Data protection. Legal protection of computer programs and databases was first fully introduced in the Russian Federation by the 1992 Law “On the Legal Protection of Programs for Electronic Computers and Databases”. To recognize the copyright for computer programs, it is not required to register it with any organization. The copyright for a program arises automatically when it is created. The author has the exclusive right to reproduce and distribute the program by any means, as well as to modify the program.

3. Generalization and systematizationknowledge. Practical work "Virus protection. Detection and Treatment ".

4. Lesson summary.Testing practical work. Grading.