2. It is loaded onto a user's computer without the user's knowledge and perform malicious actions and can be transferred from one computer to another

3. A program that runs in the background without you knowing it(thus called "spy") It has the ability to monitor what you are currently doing and typing through key logging.

4. It disguised as a useful program but once downloaded or installed, leaves your PC unprotected and allows hackers to get your information.

5. It is used to record the keystroke done by the users. This is done to steal their password or any other sensitive information.

6. It's goal is to acquire sensitive personal information like passwords and credit card details.

7. Unwanted email mostly from bots or advertisers. It can be used to send malware.

8. A program designed to send you advertisements, mostly as pop-ups.

9. A more complicated way of phishing where it exploits the DNS(Domain Name Service)

10. He created the ILOVEYOU virus.