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The term Adware frequently refers to any software
which displays advertisements, whether or not it does so with the
user's consent. Programs such as the Eudora mail client display
advertisements as an alternative to shareware registration fees.
These classify as "adware" in the sense of advertising-supported
software, but not as spyware. They do not operate surreptitiously
or mislead the user.
Many of the
programs frequently classified as spyware function as adware in
a different sense: their chief observed behavior consists of displaying
advertising. Claria Corporation's Gator Software provides an example
of this sort of program. Visited Web sites frequently install Gator
on client machines in a surreptitious manner, and it directs revenue
to the installing site and to Claria by displaying advertisements
to the user. The user's experience is that their computer begins
displaying a large number of pop-up advertisements.
"Spyware":
Research, Testing, Legislation, and Suits
Other spyware
behaviors, such as reporting on websites the user visits, frequently
accompany the displaying of advertisements. Monitoring web activity
aims at building up a marketing profile on users in order to sell
"targeted" advertisement impressions. The prevalence of
spyware has cast suspicion upon other programs that track Web browsing,
even for statistical or research purposes. Some observers describe
the Alexa Toolbar, an Internet Explorer plug-in published by Amazon.com,
as spyware (and some anti-spyware programs report it as such) although
many users choose to install it.

Spyware and
adware removal methods and scripts from a trusted resource - RemovalMethod.com
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