Still many people believe that virus plays a major role in corrupting your system. It’s named as Spyware. It is a type of malware that is installed on computers and dog boarding and training collects information about users without their knowledge. Without your knowledge spyware changes the settings and even traces your entire password from your system. Spyware programs can collect various types of personal information, such as Internet surfing habits and sites that have been visited, but can also interfere with user control of the computer in other ways, such as installing additional software and redirecting Web browser activity. Spyware does not directly spread in the manner of a computer virus or worm: generally, an infected system does not attempt to transmit the infection to other computers. Instead, spyware gets on a system through deception of the user or through exploitation of software vulnerabilities. Spyware is known to change computer settings, resulting in slow connection speeds, different home pages, and/or loss of Internet or functionality of other programs Spyware technology has the capability to send not just the banner data from the mother PC, but could channel it to other interested parties that could even install-in to a new program. The adverse effect of adware is the fact that when it is installed in the computer and the user consents to include tracking features, it automatically becomes a “spyware” when used by another user who interacts with the “adware” outside any database link