What is Spyware? A technology that assists in gathering information about a person or organization without their knowledge. On the Internet, "spyware is a program that is put in someone's computer to secretly gather information about the user and relay it to advertisers or other interested parties."

How did this happen? When your Security settings are "soft" these sites take advantage of this and actually install software on your system without your knowledge or consent. In other cases downloaded software comes bundled with other "components" (spyware\adware) that you don't realize exists until you start having problems or discover your browser has been hijacked.

Spyware software send back personal information about you, what you're typing, which programs you're using and which web sites you go to.

Spyware can be designed to retrieve anything from you PC and send it back to the site that installed it. Most Spyware is installed over the Internet by using ActiveX Controls which are basically the same thing as a web site running a program (.exe) from their site on your PC.
4Diskclean Pro prevents an ActiveX control from running in Internet Explorer by setting the "kill bit" so that the control is never called by Internet Explorer. The "kill bit" is a specific value for the Compatibility Flags DWORD value for the ActiveX control in the Windows registry.

4Diskclean Pro blocks the installation of know Spyware and in most cases will prevents those already installed from functioning. These include add on Toolbars, Adware (Software that puts annoying advertisements on your pc and collects your internet usage information), Dialers, so-called browser helpers, browser hijackers and key loggers.

4Diskclean Pro also uses the new Internet Explorer features to block effectively hundreds of bad cookies by adding those servers to the "Restricted Zone of IE". So using IE security capabilities, 4Diskclean Pro will adds to your IE(internet explorer) BLOCK LIST, more than 4000 spyware Active-x and bad cookies, preventing them to be installed while you surf the internet. Prevents Spyware from ever being installed with 4Diskclean Pro.