At first sight the Trojan appears to be a useful program, but will actually do damage once installed or run on your PC. Those who receive a Trojan normally are tricked to open them because they believe that they have received a legitimate program or secure provenance files. When you activate a Trojan on your PC, results may vary. Some Trojans are designed to be more annoying than malevolent (how to change your desktop adding silly active desktop icons), while others can cause serious damage, deleting files and destroying information from your system. Also referred to by creating backdoors Trojans or backdoors on your PC allowing malicious users access to your system, accessing your confidential or personal information via A remote systems differs from viruses and worms, Trojans or is auto replicate or reproduce infecting other files. THAT is an ANTIVIRUS is a program created to prevent or avoid the activation of the virus, as well as its propagation and infection. It also has routines of detention, removal and reconstruction of infected the system areas and files. An antivirus has three main functions and components: vaccine is a program that installed resident in the memory, acts as a filter of the programs that are executed, open to be read or copied, in real time.
DETECTOR, which is the program that examines all existing files on disk or indicate that a given route or PATH. It has instructions for exact recognition of viral codes that allow you to capture their peers, duly registered and extremely quickly disarm its structure and control. ELIMINATOR is the program that once off the structure of the virus proceeds to delete it and immediately afterwards to repair or reconstruct files and affected areas. It is important to clarify that all antivirus is a program, and as a whole program only works properly if it is suitable and properly configured.