The major threats to your computer’s security these days include viruses, adware and spyware. These are scripts or programs written to infect your PC and they often spread from one computer to another.
Spyware is designed to covertly infect a computer for the purpose of “spying” or obtaining personal information from that computer or from other computers on the same network. When used effectively the computer user is unaware they have been infected with spyware. The user continues to use the computer in a normal matter as the software collects information and sends it to the party, generally known as hackers, who are spreading the spyware. In some cases, the spyware may send the collected information to some other third party. Spyware blockers are software programs designed to protect your computer from spyware.