Spyware/Adware is any program that monitors or gathers information about a computers users browsing habits and their computer use without his or her knowledge. The programs are generally installed on the users end computer by downloading applications and programs off the internet that contain these spyware/adware applications and are not apparent to the user on installation
of the program that they originally wanted and downloaded.

Essentially the program collects and gathers information about the user and is usually then sent back to the spyware/adware site for data collection of the users internet usage and browsing habits of online activity.

Although many spyware/adware applications are also malicious these typically can hijack a users browser and redirect the user to unwanted locations on the internet or display ads to the user without them having control over their computer. In many cases these adware/spyware applications are difficult to remove from the computer since they write to the windows registry file and almost act like a virus application on installation remaining memory resident apon boot up.

The removal of many of these applications is very difficult for the novice user to preform, requiring special skills and talents gained over many years of dealing with these annoyance applications.

However there are many applications on the internet that are free that will allow the novice user the ability to remove these applications, sometimes running just one of these applications doesn't completely remove all the spyware/adware applications from the users computer. It may take several removal applications to preform complete removal of all spyware/adware from the users computer.

Spyware/Adware is constantly being created and is ever evolving, this why you may have to run several removal applications to completely remove them from the computer.
The following are links to some of the best spyware/adware removal applications that many companys run on end users computers and charge the end user for removal of the spyware/adware  applications installed on their computers. The following programs are currently free applications to end users some requesting donations others are completely free. The following applications typically remove known data-mining, advertising, malware, adware, trojans, browser hijacks and other tracking software.
SpyBot is one of the best software applications for removal of spyware/adware from your computer system, the software will remove all known spyware/adware as of the latest and most current definition file available. It is for the most part a straight forward application to use, with directions on how to use the application on installation.
Ad-Adware Se Personal is another great application that will remove spyware/adware from your computer systems, the software will remove all known spyware/adware as of the latest and most current definition file available. It is also for the most part a straight forward application to use with directions on how to use the application on installation.
Windows Defender made by of course the Microsoft Corporation, this is Microsoft's entry in the spyware/adware removal market. This is also another great application that will remove all known spyware/adware as of the latest and most current definition file available. It is also for the most part a straight forward application to use with directions on how to use the application on installation.