Note that many websites have their own advertising, unrelated to adware.
Adware is any software application in which advertising is displayed while the program is running. The authors of these applications include additional code that delivers the ads, which can be viewed through pop-up windows or through a bar that appears on a computer screen and sometimes through text links or in integrated search results. Adware may or may not track personal information. It may also gather information anonymously or in aggregate only. Users should check the EULA and Privacy policy to ensure if the adware on their machines conforms to their standards.
Comment:
Aornum is a task started with Windows which keeps in contact with its controlling servers, combined with an IE Browser Helper Object.
Information
URL:
http://home.iwon.com/index_gen.html
Manual
removal:
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
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