Computer Viruses

Computer Viruses

Computer Virus is a kind of malicious software written intentionally to enter a computer without the user’s permission or knowledge, with an ability to replicate itself, thus continuing to spread. Some viruses do little but replicate others can cause severe harm or adversely effect program and performance of the system. A virus should never be assumed harmless and left on a system. Most common types of viruses are mentioned below

Resident Viruses, Direct Action Viruses, Overwrite Viruses, Boot Virus, Macro Virus, Directory Virus, Polymorphic Virus, File Infectors, Companion Viruses, FAT Virus , Worms, Trojans or Trojan Horses, Logic Bombs