Spyware Site Blocker is a security utility that helps protect Windows users from spyware, virus, Trojan, and other unwanted software. Even unknown spyware can be prevented and reported. Spyware Site Blocker can also protect your Web pages, important files, and folders. This helps to reduce the negative effects caused by spyware, including annoying pop-up ads, slow PC performance, and leakiness of private documents.