A virus will add itself to a document, and then replicate itself and look for other files to infect.
Worm
A worm is like a virus, accept that it doesn't necessirily harm filres. It just copies itself so many times that the system crashes
Trojan
Named after the Greek Trojan horse, a trojan appears completely harmless, but
when it is downloaded, it will carry out another objective in the background.
Spyware
Spyware stays out of your view so as to spy on your persinal details. The information is then sent secretly over
the internet to those who want it.
Adware
This can force your computer to show up ads, which if you click on will
take you to unwanted and/or fake websites.
Pharming
Pharming malware will redirect you from a website that you are going to to a fake website that looks very real.If you enter details, they can then
store them and do what they like to your accounts.,
Click Fraud
They use your computer's resources to open websites and send a mouse click to the adverts. Every click gives them money, but you won't know they're doing it because it's all in the background.
Ransomware
Ransomware encrypts critical files and data . Eventually it asks the user for a ransom for their
files.
Rootkit
Rookits give other people permission to access your computer, allowing them to remotely controll
it and do whatever they like.
Scareware
Scareware will acuse pop-ups to appear saying things that scare you into clicking on them and buying
their fake software.