Viruses

1
Viruses
2
Learning Objectives

• At the end of this lesson you should be able to

3
Learning Objectives

• At the end of this lesson you should be able to
• describe what a computer virus is

4
Learning Objectives

• At the end of this lesson you should be able to
• describe what a computer virus is
• explain the measures which must be taken in order
  to protect against viruses

5
What is a Virus?
6
What is a Virus?

• it is a program

7
What is a Virus?

1. it is a program
2. it makes copies of itself

8
What is a Virus?

• it is a program,
• it makes copies of itself,
• it causes damage.

9
How do you get viruses?

• A virus can be introduced into your computer
  from

10
How do you get viruses?

• A virus can be introduced into your computer
  from
• a floppy disk, CDROM, memory stick ,

11
How do you get viruses?

• A virus can be introduced into your computer
  from
• a floppy disk, CDROM, memory stick ,
• email attachment,

12
How do you get viruses?

• A virus can be introduced into your computer
  from
• a floppy disk, CDROM, memory stick ,
• email attachment,
• Internet websites.

13
What happens when you get viruses?

• If your computer gets infected by a virus it can

14
What happens when you get viruses?

• If your computer gets infected by a virus it can
• spread to other programs on your hard disk,

15
What happens when you get viruses?

• If your computer gets infected by a virus it can
• spread to other programs on your hard disk,
• copy itself onto floppy disks or memory sticks,

16
What happens when you get viruses?

• If your computer gets infected by a virus it can
• spread to other programs on your hard disk,
• copy itself onto floppy disks or memory sticks,
• email itself to all the contacts in your address
  book.

17
Why should I worry?

• If your computer gets infected by a virus it can

18
Why should I worry?

• If your computer gets infected by a virus it can
• damage your programs so they wont run,

19
Why should I worry?

• If your computer gets infected by a virus it can
• damage your programs so they wont run,
• stop your computer working completely,

20
Why should I worry?

• If your computer gets infected by a virus it can
• damage your programs so they wont run,
• stop your computer working completely,
• delete or corrupt data on your computer,

21
Why should I worry?

• If your computer gets infected by a virus it can
• damage your programs so they wont run,
• stop your computer working completely,
• delete or corrupt data on your computer,
• infect your friends computers too.

22
What can I do to protect myself?
23
What can I do to protect myself?

• Install anti-virus software
• this will detect and destroys viruses
• important to have regular updates to deal with
  new viruses.

24
What can I do to protect myself?

• Install anti-virus software
• this will detect and destroys viruses
• important to have regular updates to deal with
  new viruses.
• Never open an unexpected email attachment
• unless it is from someone you trust,

25
What can I do to protect myself?

• Install anti-virus software
• this will detect and destroys viruses
• important to have regular updates to deal with
  new viruses.
• Never open an unexpected email attachment
• unless it is from someone you trust,
• Dont use memory sticks or disks that are not
  yours
• unless you virus check then first

26
What can I do to protect myself?

• Install anti-virus software
• this will detect and destroys viruses
• important to have regular updates to deal with
  new viruses.
• Never open an unexpected email attachment
• unless it is from someone you trust,
• Dont use memory sticks or disks that are not
  yours
• unless you virus check then first
• Be careful when visiting new websites
• many websites can to trick you into downloading
  viruses

27
Things to do

• Log on
• Select Internet Explorer
• Select ICT from the Subject Index menu
• Click on this link
• ICT Short course GCSE Revision Notes
• Add this page to your Favourites is you havent
  already
• Scroll to the bottom of the page and click on
  this link
• 3. describe what a computer virus is
• Copy Paste the questions into a new Word
  document
• Type your Answers to the questions
• Save your answers in your home area as Viruses