Theme 2. Software. Windows Ms-office. Information networks

To implement - programs of auxiliary (service) appointment. The service software includes archivers, antivirus, packers, russifiers, diagnostic programs, optimizations, access restrictions, etc.

Archiver. Archival copies are used to create archives that allow you to pre-compress information from 20 to 90%. 

Among the most well-known and widely used archivists include PKZIP, PKUNZIP, ARJ, RAR, PKPAK, PKUNPAK, LHA.

Antivirus programs. Computer virus - a small program that joins the file or the middle of the program and can independently multiply (create their copies). The action of the virus manifests itself in different ways from the wrong program operation to spoil all the data on the disk.

To detect and eliminate viruses, many anti-virus programs have been developed, including AVP, Aidstest, Doctor Web, NOD32, and others. For example, "Kaspersky Lab" (1997) is engaged in antiviral research since 1989.