This document discusses different types of computer viruses and provides tips to prevent viruses. It describes three main types of viruses: file infectors, boot sector viruses, and Trojan horse viruses. It notes that Windows XP deals with viruses more seriously and recommends using antivirus programs to protect systems. Two specific tips provided are to be careful with floppy disks which are a main virus source, and to exercise caution when downloading files from the internet. It also stresses the importance of keeping antivirus programs and virus libraries up-to-date, as over 100 new virus strains are released each month.

1. R.D.SIVAKUMAR, M.Sc.,M.Phil.,M.Tech.,
Assistant Professor of Computer Science &
Assistant Professor and Head, Department of M.Com.(CA),
Ayya Nadar Janaki Ammal College,
Sivakasi – 626 124.
Mobile: 099440-42243
e-mail : sivamsccsit@gmail.com
website: www.rdsivakumar.blogspot.in
GUARDINGAGAINSTVIRUS

2. GUARDINGAGAINSTVIRUS
Viruses come in three basic flavors. They are File infectors, Boot
sector viruses and Trojan horse viruses
File infectors attach themselves to executable files and spread among other files when
you run the program.
Boot sector viruses replace the hard disk’s master boot record (or the boot sector on a
floppy disk) with their own twisted version of the bootstrap code. This lets them load
themselves into memory whenever you boot your system (the famous
“Michelangelo” virus is one of these boot sector beasts).
Trojan horse viruses, which appear to be legitimate programs at first glance but when
loaded, proceed to viciously damage your data:
Microsoft deals with this crime more seriously in Windows XP. There are vendors who
provide antiviral vaccines that will protect you from the hazards of this threat. Antivirus
is a programto safeguard your system from the virus programs.

3. GUARDINGAGAINSTVIRUS
There are many such antiviruses, which make the life of the programmers
somewhat easy.
Here are two tips to keep your system virus-free:
1. The main source of the viruses is the floppy disk. So, one should
be very careful about the floppies.
2. Now-a-days, the Internet is the major source of producing viruses.
One should be very careful while downloading files from the Internet.
Keep your virus utility’s virus library up-to-date.
By some accounts, more than 100 new virus strains are released each month,
and they just get nastier and nastier.
Regular updates will help you keep up-to-date.

4. TheEconomical Explorer Keyboard

5. TheEconomical Explorer Keyboard

6. Thankyou..!!