1. Computer security By
Isabelle Cooper

2. Viruses
Worm: A worm is a programme that makes copies of itself, for example from disk drive to another, or by copying itself using .
Rootkit virus: A rootkit virus is an undetectable virus which attempts to allow someone to gain control of a computer system. These viruses are usually installed by Trojans and are normally disguised as operating system files.
Bootsector virus: This is a virus that attaches itself to the first part of the hard disk . These are normally spread by floppy disks.
IILOVEYOU: The ILOVEYOU virus is very clever because it comes up as one of your s and makes you think it is a love letter. If u open the attachment the worm sent copies of itself to everyone in the windows address book and with the users sender address.
Trojan horse: A Trojan horse programme has the appearance of having a useful function. A Trojan horses doesn’t copy itself but causes to the security of the computer. 2

3. What is a virus
Computer viruses are small software programmes that are designed to spread from one computer to another and to interfere with the computer operation. A virus might corrupt or delete data on your computer, use your programme to spread itself to other computers, or even delete everything on your hard disk. Viruses are most easily spread by attachments in messages. That is why it is important never to open attachments unless you know who it is from or you are expecting it. Viruses can be disguised very cleverly as attachments images, cards etc. Viruses can also spread through downloads on the internet. They can be hidden in software and other files or programmes you might download. 3

4. What damage can a virus do
What damage can a virus do? Computer viruses can do varying amounts of damage to your computer depending on what type of virus it is. Viruses have many ways in which they can damage computers. Some viruses can prevent you from being able to use your computer at all and not being able to even turn your computer on. Some other viruses can damage specific parts of your computer like the Trojan virus. Others delete your files that causes lots of havoc. Also when you get a virus you may get random pop-ups come up on your screen to try and make you download something or trying to sell you something.
How can you stop yourself from getting a virus on your computer? To help stop getting a computer virus having a good anti-virus software is a good idea as it does virus checks on your system and warns you if it detects a virus. The programme should also provide a way for you to update its virus definitions, or signatures, so that your virus protection will be covered. Always we very careful when opening attachments you receive in an -particularly if the comes from someone you don’t know.

5. What is Hacking?
Hacking is basically gaining an unauthorised access to a computer system, so the owner of the computer does not know that they are on their. These people that hack into your computers are called hackers. Hackers first attack the easy targets . Computer hacking is most common among teenagers and young adults, although there are many older adults as well. Many hackers are technology buffs who enjoy learning more about how computers work and they consider computer hacking as a talent. 5

6. What damage can Hackers do
Hackers like to disrupt computer security without permission. They are cyber criminals. This can mean gaining access to a computer across the internet for illegal purposes. They might engage in:
vandalism- which they break in to someone's computer and leave their mark to show that they have been there.
Hacktivism- A form of vandalism.
Theft- Gaining access to intellectual or proprietary technology or information, sometimes for resale.
Identity theft- Electronic theft or personal information that can be used for financial resources from an individual corporation.
Hijacking- Many of the financial motivated hackers are interested in using viruses and Trojan horses to hijack your computer so they can remotely control it for their own purposes.

7. How can you stop hackers being able to get on your computer
To help stop hackers from being able to get on your computer you can:
Use anti-virus software and keep it current. Installing an anti-virus programme can keep viruses and other nasty programmes out of your computer.
Activate a firewall. Many people use software or hardware firewalls to prevent hackers from gaining access to their files through ports or other points of entry.
Keep track of system events. Check your system log often to find out what your computer is doing. If you are getting notices about any programmes you don’t remember starting or installing, then be alert.
Make sure your operating system is up to date. Windows updates are crucial to protecting your computer from recently discovered security holes.

8. Hackers
Matthew Anderson
Gary Mckinnon
These two men are famous hackers that have been known to hack into hundreds of peoples computers without them knowing anything about it.

9. Why is it important to back up your work/information
Backing up your work and information is one of the most important, but yet neglected areas of computing. Backing up your data is crucial. Without data backup or virus protection, you will be running the risk of loosing your data. Data loss can happen in many different ways. You probably have everything saved on your PC’s hard drive. After time your hard drive will die, it will happen gradually. Another bad storage media are floppy disks. They are good for temporary storage and maybe transporting information, but not for permanent data storage. Another possible cause of data storage is powerful failure or spikes. It can cause the loss of the document you are currently working on because you did not save it before the power failed and your PC shut down.

10. What should you back up your work on to
You could back up your work and information on to many different things that will be safe and if something id to happen to your hard disk then you always have a spare copy of your work and information. You can use a memory stick or USB stick. It is very simple to download another copy of your work on to your USB stick as all you do it insert the stick into the computer and save it on the stick. You can also use a separate backup drive which is basically a small hard drive which copies everything that is on your main hard drive. Lastly there is also just a plain disk you can use to save your work.

11. Backups
Where should you keep your backed up work/information onto? You should keep your backed up work and information on either a memory stick (USB) or some sort of disk. This is very safe because just in case something does happen to your computer you always have another copy of it on your disk or USB, so you will not have to worry about anything.
How can you keep your backed up work secure? You can keep your backed up work secure by checking that your work is still on your memory stick etc and nothing has happened. Also make sure you do not work on your memory stick and make sure you also save it on your computer in case something happens to your memory stick or disk.