Some Useful Terms

Spyware :
Programs that causes your computer to display ads even when you are not using the program in question for its intended purpose.
Spyware hijacks computers,secretly changing their settings, bauanges them with pop up ads, and installs adware and other software program that may cause computer to malfunction, slow down and even crash.

Phishing Attacks:

The fraudulent solicitation for account information such as credit card numbers and passwords by impersonating the domain and email content of a company.