Vocabulary

Attempet                  Manageable      Entire                Hopefully                 Back up
Destruction               Nature              Many                Will                         At least
Someone                  Deal                  Download         Immediately             Every
Have been                Once                Boot sector        Partition sector         Read-only
Attach                       Has been         File virus             May                       Update
Themselves               Spread             Comminly           Expect                    Ongoing basis
Knowledge               Wildfere           Overwrite           Nowhere                 The latest
Nuisance                   Through           Symptom            Usuarlly                   Appoach

Precautions for virus

Most viruses spraad when you have booted the computer from an infected diskette
or by the internet. A healthy  precaution here would only to boot from the hard
drive.

1. Backup all file. At least two complete backups.
2. Scan every diskette before use.
3. Mark all software program attributes as read only.
4. Research and update anti-virus producis on an ongoing basis to have latest protection.
5. A multiple anti-virus program library is a recommended approach.

Viruses symptoms

How can you tell if have a virus?

Hopefully, you will install anti-virus software in your PC that will identify viruses
and tell you immeediately about thet presence of them in your system.

When there is a virus in youy computer system. You may expect different symptoms
such as;

• Slow processing
• Animation or sound appears out of nowhere
• Unusually heavy disk avtivity
• Odd changes in files
• Unusual printer activity

Boot sector viruses

the boot sector viruses is an early type of computer spreads by hiding itsel
in an invisible location on your hard drive or floppy disk.It may also be caller
system sector viruses because they attack the system sector. System or boot sector
contain programs that are executed when the PC is booted.Two types of systen
sectors exist; DOS sectors and partition sector.

File viruses

A file virus  is one that replaces a key system file on your computer.These viruses
can reload themselves every time you start your computer up. Once they're in the
memory. they can spread by writing themselves to any disk you inset into your disk.

Origins of virus

how do you get a virus?

computer viruses can come from different sources:

• An infected Diskette
• Cownloading an infected file from the internet, or an online service.
• from infected network files or programs.

Categories of viruses

Computer viruses come in two categories:

• Boot sector viruses
• File viruses
• Trojan horse viruses

Anti- virus

Anti-virus programs examine the boot sector and the executable files on the disk
identify and virus and try to eliminate it. You cam also configure the anti-viru
programs so the are active at all time. searching infected files.

Computer viruses

Computer viruses are malicieus software designed to attemp some form of

destuction to someone's computer system. They are instroction or code that have

been designed to reproduce as they attach themselves to other programs without the

user's knowlerdge. Viruses ban be programmed to do many things, including copying

themselves in other program. show information on the screen, destroy data file or

erase an entire hard disk.

Viruses are nuisance, but if you know how they work and take the necessary

precautions to deal with them, they are manageable.

Once the infection has been transferred, the viruses can spread like wildfire though

the entire library of files.

There are many types of viruses; some are more debilitationg others.