Transcript Viruses, Worms and Trojans

Viruses, Worms and Trojans
They’re all bad, how to tell the
differences?
By Nick
Virus
• A virus is a program that can
• cause damage to files on computer.
• The virus attaches it’s self to a host file (a
file that is commonly distributed) which is
then opened/run by the user and the virus
spreads to other files.
How to tell you have a virus?
• Viruses will generally do the following things:
• Displays unwanted messages eg. Pop-ups, even
when you are not on the internet.
• Unusual sound or visual effects.
• Loss of data or data corruption.
• Computers restarting continuously.
Worms
• A worm replicates (like bacteria) it’s self to
infect many files and can spread without a
host file i.e. a program
• Worms are not as dangerous as viruses.
How to tell if you have a worm?
• Worms consume bandwidth meaning that the internet
connection is slower.
• This is a problem for networks as it creates extra
network traffic which makes everything.
• Worms are generally transferred through emails and
through Trojan horses.
Trojan Horse
• A program that appears to be normal but
contains malicious code inside.
• They sometimes contain worms and viruses.
How to delete trojans
• There is no single method to delete them
but the easiest way is to clear temporary
internet files.
• They can also be deleted manually.
THE END