Spyware is a danger on any computer with access to the Internet. Software to detect and remove spyware is readily available and should always be installed, along with anti-virus software, to protect the computer and the user.
Spyware, as it's name suggests, spies on PC user habits. The mildest types are really little more than a nuisance, popping up advertising according to the type of websites visited. At its worst, spyware can damage system files and steal passwords or other personal information.
Tenebril SpyCatcher is a well recommended anti-spyware program. It's attractive and easy to use interface disguises powerful and effective spyware elimination techniques, with features including: