It is some time since I used IE but a recent event suggests something has been added since I last used it. On opening the home page a message appears to offer the chance to win some gizmo or other. When I tried to close it, the message just kept reappearing. It was only by closing down the IE window completely that it was possible to get rid of the 'circular' winning message. Shan't be opening that browser for some time me thinks!
Re: Internet explorer?
You might want to run a spyware/adware/scumware scanner. Just to be sure that IE hasn't been hijacked by a malicious piece of software. And stay away from IE anyway; it's an abysmal browser.