Spyware is computer software that collects personal information about a user of a computer without their informed consent. Malware is software designed to infiltrate and intentionally or otherwise damage a computer system without the owner's informed consent.

In computing, phishing is a criminal activity using social engineering techniques. Phishers attempt to fraudulently acquire sensitive information, such as passwords and credit card details, by masquerading as a trustworthy person or business in an electronic communication. Phishing is typically carried out using email or an instant message.

E-mail spam involves sending nearly identical messages typically to millions of recipients by E-mail. By popular definition, a spam message is an unwanted email that is sent without the permission of the recipient.

Here are some techniques to avoiding and/or dealing with these problems:

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