$_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.
Aornum is a task started with Windows which keeps in contact with its controlling servers, combined with an IE Browser Helper Object.
Go to the Control Panel's Add/Remove Programs option and remove 'iWon Plus'. You will probably also want to remove the 'iWon EZ Setup' entry which is the installer (allowing iWon-signed code to be installed from a web page) and the 'iWon Search Assistant' which monitors terms entered into search engines and hijacks IE search settings.
(The 'iWon co-pilot' toolbar is not known to be harmful, you can choose to keep or remove it.)
Next, open the registry (Start->Run->regedit) and find the key HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run. Delete the 'Aornum' value. Now reboot and you should be able to delete the 'Ornum' folder in Program Files, and anything in the 'iWon' folder you didn't keep