Spyware and Adware
One definition for spyware is
The goal is often to collect personal information, usually without the user's comprehension. But there are many other things spyware can be used for. So most spyware programs do not have harmful payloads in the usual sense of viruses, trojan horses or worms. But their danger lies in the sorts of information they can collect, how it might be disseminated and how much computing resources they consume.
The following is a list of a variety of things spyware might be used for.
Users are usually tricked into installing spyware by a variety of means.
Spyware can be installed for a number of false purposes.
Spyware usually doesn't self-replicate.
Some of the most common spyware names are
Protection. The single best approach to protecting your system from spyware is to never download an/or install that has uncertain sources, security and integrity. A good up-to-date virus scanning program should help considerably with detecting known spyware that has gotten installed on a system. Such scanning software should also help to detect and prevent installation of spyware.
Some examples of anti-spyware programs or security systems that include spyware capabilities are listed below.
It shouldn't be too surprising that some of these spyware scanners report the presence of their competitor's software as spyware. There has been some publicity about such curious and conflicting claims.
More will be added.