What is Spyware?

Spyware can be any software that does the following:

1. Installs itself on your computer without your knowledge and/or consent.
2. Collects/transmits information about your computer use or other habits without your knowledge and/or consent.
3. Keeps reinstalling itself, no matter how many times you remove it.
4. Sends you unwanted advertisements in the form of pop-ups on your computer whether you are online browsing or not.