Note that many websites have their own advertising, unrelated to adware.
Browser toolbar, often bundled with other programs, created "to provide you with alternate text search results when you are looking for something".
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Creates its own search results bar.
Taken directly from their own page http://www.zsearchtoolbar.com/privacy.htm :
What information is collected:
- The web pages you view while surfing the Internet
- How and if you respond to the search results
- Your computer type, internet connection, operating system, browser and basic system set-up (screen resolution, time zone selected, etc.).
- What software you have on your computer
Also, there is a mention of a "randomly assigned marker that is tied to your computer"
What is done with this information:
"We then take this aggregated and anonymous information about our Software users and share it with our current and potential clients"
There should be a "ZSearch" entry in "Add/Remove Programs".