a very nice video about viruses

1. Summer holiday
H.W.
By-yashna badiye class-6th a

2. What is “VIRUS”
• A computer virus is a program or piece of code that is
loaded onto your computer without your knowledge and
runs against your wishes. Viruses can also replicate
themselves. All computer viruses are man-made.
• A simple virus that can make a copy of itself over and over
again is relatively easy to produce.Even such a simple virus is
dangerous because it will quickly use all
available memory and bring the system to a halt. An even
more dangerous type of virus is one capable of transmitting
itself across networks and bypassing security systems

3. More about “virus”
• Since 1987, when a virus infected ARPANET, a large
network used by the Defense Department and many
universities, many antivirus programs have become available.
These programs periodically check your computer system for
the best-known types of viruses.
• Some people distinguish between general viruses
and worms. A worm is a special type of virus that can
replicate itself and use memory, but cannot attach itself to
other programs.

4. Virus protection

5. virus protection
• Virus protection software is designed to
prevent viruses, worms and Trojan horses from getting onto
a computer as well as remove any malicious software code
that has already infected a computer.
• Most virus protection utilities now bundle anti-spyware and
anti-malware capabilities to go along with anti-virus
protection. Internet security suites go a step further by
including additional capabilities like anti-spam, anti-
phishing, firewall, file protection and PC optimization.
•

6. Anti virus protection

7. Anti-virus protection
• Anti-virus software (often abbreviated as AV), sometimes known
as anti-malware software, is computer software used to prevent,
detect and remove malicious software.
• Antivirus software was originally developed to detect and
remove computer viruses, hence the name. However, with the
proliferation of other kinds of malware, antivirus software started
to provide protection from other computer threats. In particular,
modern antivirus software can protect from: malicious browser
helper objects (BHOs), browser hijackers, ransom ware, key
loggers, backdoors, root kits, Trojan horses, worms,
malicious LSPs, dialers, fraud tools, adware and spyware.

8. Continued – anti virus protection
• Some products also include protection from other computer
threats, such as infected and
malicious URLs, spam, scam and phishing attacks, online
identity (privacy), online banking attacks, social
engineering techniques, advanced persistent threat (APT)
and botnet DDoS attacks.
• Anybody who accesses the internet can benefit from knowing
about various antivirus programs that enable you to stay safe
while online. Accessing websites leaves the way open for
unscrupulous people to infect your computer to secretly gather
information or spy on what you do. By installing suitable software,
you can prevent viruses from invading your home computer

9. Examples
• AVG
• AVG is one of the most popular antivirus programs that can
be obtained for free, and it’s easy to download directly from
the internet
• McAfee
• McAfee Virus Scan has been the second most popular
antivirus program on the market for years, which has
enabled the company to cement their position as a strong
competitor to Symantec.

10. Examples continued
• Ad Aware
• This software by Lava soft is another antivirus program that
provides protection against a large number of cyber security
threats that arise from using the Internet. They offer
different levels of protection according to how much you
want to spend in a one-off payment for the program. In
addition to finding and removing viruses and spyware that
can detect key strokes and passwords, it will protect against
Trojans.

11. Examples continued
• Norton
• There are a number of Norton antivirus programs available, all
produced by Symantec.
• Kaspersky
• Russian-developed Kaspersky is not the most popular of all the
antivirus protection programs; many people have probably never
heard of them. However, they still provide a very effective product
for protection against viruses, spyware, and Trojans. Kaspersky
Internet Security and Kaspersky Antivirus prevent problems that
computers will encounter in the event that they become infected

12. The first boot
sector virus

13. What is a boot sector virus
• A boot sector virus is a computer virus that infects a storage
device's master boot record (MBR). It is not mandatory that
a boot sector virus successfully boot the victim's PC to infect
it. As a result, even non-bootable media can trigger the
spread of boot sector viruses. These viruses copy their
infected code either to the floppy disk's boot sector or to the
hard disk's partition table. During start-up, the virus gets
loaded to the computer's memory. As soon as the virus is
saved to the memory, it infects the non-infected disks used
by the system.

14. The first boot sector virus
• Brain (computer virus)
• Brain is the industry standard name for a computer
virus that was released in its first form in January
1986, and is considered to be the first computer
virus for MS-DOS. It infects the boot sector of storage media
formatted with the DOS File Allocation Table (FAT) file
system. Brain was written by two brothers, Basit Farooq Alvi
and Amjad Farooq Alvi, from Lahore, Punjab, Pakistan.