About Virus

—A computer virus is an executable program. Depend on the nature of a virus, it may cause damage of your hard disk contents, and/or interfere normal operation of your computer.
—By definition, a virus program is able to replicate itself. This means that the virus multiplies on a computer by making copies of itself. This replication is intentional; it is part of the virus program. In most cases, if a file that contains virus is executed or copied onto another computer, then that computer will also be "infected" by the same virus.
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Cyber Crime

 Cyber crime refers to any crime that involves a computer and a network. The computer may have been used in the commission of a crime, or it may be the target. Net crime refers to criminal exploitation of the Internet. Cybercrimes are defined as: "Offences that are committed against individuals or groups of individuals with a criminal motive to intentionally harm the reputation of the victim or cause physical or mental harm to the victim directly or indirectly, using modern telecommunication networks such as Internet (Chat rooms, emails, notice boards and groups) and mobile phones (SMS/MMS)".

Cyber Forensic

"Cyber" is a prefix used to describe a person, thing, or idea as part of the computer and information age.  Forensic is a word that means something is related to law, courts, or public debate. A career in any field of forensics means you will be working closely with law enforcement to collect and analyze evidence to use in the investigation.