$_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: "The Machers Toolbar is the one browser companion your whole family will appreciate. Easy to install and downloads in seconds, the toolbar puts a variety of functionality right on the top of your web browser. Best of all, it's FREE!"