The term spyware or spy programs used on computer programs that install themselves with a client, usually without the client knows something about this. You can protect your computer from spyware programs, but these must typically be updated often to keep up with the growth of new spyware programs.
Spyware is a general kind of malware that is spread on your computer, and see what you are doing. It reminds some of a keylogger , and to protect themselves against spyware programs that include Spyware Blaster , which can be downloaded from many websites. However, there arises constantly newer versions of spyware, and therefore they are always hard to find.