This section provides a quick description of what is Spybot and how to download and install Spybot on a Windows system.
After see my friend's machine been infected by spyware, I went to Internet to search for a good anti-spyware tool.
The first one I found was Spybot - Search & Destroy produced by safer-networking.org.
Short product description by safer-networking.org:
Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat
not yet covered by common anti-virus applications. Spyware silently tracks your surfing behaviour
to create a marketing profile for you that is transmitted without your knowledge to the compilers
and sold to advertising companies. If you see new toolbars in your Internet Explorer
that you haven't intentionally installed, if your browser crashes inexplicably, or
if your home page has been "hijacked" (or changed without your knowledge),
your computer is most probably infected with spyware. Even if you don't see the symptoms,
your computer may be infected, because more and more spyware is emerging.
Spybot-S&D is free, so there's no harm giving it a try to see if something has invaded your computer.
I wanted to try it:
1. Download the binary from http://safer-networking.org.
2. Double click the binary file to install it at C:\Program Files\Spybot - Search & Destroy.