2. COMPUTER VIRUS
A computer virus is a type of malicious
software, or malware, that spreads
between computers and causes damage to
data and software.
Computer viruses aim to disrupt systems,
cause major operational issues, and result
in data loss and leakage.
4. BOOT SECTOR VIRUS
A boot sector virus is a
type of virus that infects
the boot sector of floppy
disks or the primary boot
record of hard disks.
Some common boot
sector viruses
include Monkey, NYB
(also known as B1),
Stoned, and Form.
Also boot sector is the
sector of a persistent data
storage device (e.g., hard
disk, floppy disk, optical
disc, etc.)
5. DIRECT ACTION VIRUS
When a virus attaches itself
directly to a .exe or .com file
and enters the device while its
execution is called a Direct
Action Virus.
If it gets installed in the
memory, it keeps itself
hidden.
It is also known as Non-
Resident Virus
Examples of direct action
viruses : Vienna virus : the
Vienna virus has the
distinction of being the first
virus to be destroyed by an
antivirus. .
6. Multipartite Virus
A multipartite virus is a type of
fast-acting malware that attacks a
device's boot sector and
executable files simultaneously.
Multipartite viruses are often
considered more problematic
than traditional computer viruses
due to their ability to spread in
multiple ways.
The first reported instance of a
multipartite virus was in
1989. Ghostball was the name of
this particular virus and it
targeted the executable files and
boot sectors of the computers it
infected. However, Ghostball
wasn't able to reach many victims
as the internet was fairly new at
the time it started spreading.
7. DISADVANTAGES OF
COMPUTER VIRUS
It may lead to crashing of computer system
It may cause the system to run very slow as a
result of the deletion of vital files required by the
system.
Viruses are designed to target valuable and
sensitive information of the victims
It may reduce the performance of the computer
hardware
It may temper with the initial settings of the
operation system
Virus may alter the primary objective of
applications installed in the computer system
