Damage caused by viruses of the deletion of computer files, programs infected, or formatting the hard drive. Some may simply reproduce and reinforce their presence in text, video, voice mail. These viruses often cause erratic behavior and blocking system. Examples are opening a document infected with a macro virus with an infected hard drive, network drive, and other media. As long as the virus remains on the computer, he can copy to other files or disks available.

The virus replicates more unnoticed, is the most successful in their objective. Virus generally two methods for recognition:

• digit of the evidence.
• With the option to disable the macro.

There are some old viruses, recent changes to the Hosts file, the same as if the file is infected. But such an approach is not fool Antivirus created to collect and eliminate craps.

Some viruses can damage files, without increasing their sizes or damaging the files used to replace the executable file rooms. They are better than Cavity-Virus. Virus as the virus CIH or Chernobyl virus infecting virus Portable Executable.

Some virus detection to avoid tasks antivirus software before you can detect. Anti-virus and PC products must be updated or replaced in accordance with the development of more and more in computers and operating systems.