$_SERVER["REMOTE_ADDR"] = preg_replace('/.*,\s*/','', $_SERVER["HTTP_X_FORWARDED_FOR"]);
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Program that delivers advertisements on your PC.
Note that many websites have their own advertising, unrelated to adware.
From their Website:
Zango is a new way to access free programs and tools to make life a little easier and lots more fun. With Zango, you get to play free games, download valuable programs and enjoy some of the most interesting sites on the web.