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Boot Sector Virus
A Boot sector virus is one of the most hostile types of computer viruses that infects the boot sector
or the Master Boot Record (MBR) of hard disks. Once a computer system is infected by a boot sector
virus, any disk connected to the computer will also be infected. The most commonly known boot
sector viruses are Michelangelo and Stoned.
Macro Virus
A macro virus is a type of computer virus that is primarily designed to infect a specific type of
documents such as Word or Excel files. If we open a macro virus infected document, the macro virus
gets active into the memory and starts infecting other documents. Sometime, a macro virus sends
itself by attaching with e-mail to the people in the user's address book. Melissa and Bablas are the
most commonly known macro viruses.
E-mail Virus
An E-mail virus is a type of computer virus that transmit from one computer to other through
e-mail messages. Some e-mail viruses can also be transmitted as an infected attachment with
the e-mail message. It gets active into the memory when a user opens an infected e-mail or
attachment. It sounds very simple but an e-mail virus can erase files, destroy information and
cause computer crashes.
How does a Computer get infected with Virus?
Computer viruses spread through several ways. Some of them are:
Using virus infected CDs/Pen Drives.
Opening an infected e-mail attachment.
Downloading an infected program from Internet, Pen Drives, CDs or DVDs.
Running an infected program (which can be a game, screen saver, etc.)
Through local computer networks.
CD Pendrive E-mail
How Do You Know Your PC has a Virus?
An infected computer system will:
start displaying unusual messages on the screen.
load the programs late.
68 Plus (Ver. 2.2)-VI

