If you are using IE, you might want to reconsider your choice (or not choice) of browser. I suggest Mozilla Firefox or Opera. IE is not a very quality browser, since it has multiple security vulnerabilities and is especially succeptible to adware and spyware attacks. If you MUST use IE, then keep antivirus software updated regularly, have a firewall (Zone Alarm of Kerio Personal Firewall), and run Adaware and Spybot S&D regularly. You are most likely infected with something that the manufacturer put there in the first place. Why they would do this, I don't know.
If you have any additional questions, you can e-mail me a
heinouskyle@gmail.com. I would be happy to help.