Does your Internet Explorer title bar display ISP branding information that you'd like to remove? On a Microsoft Windows computer, working through the steps given here might help you return things to "normal".
Warning: The procedures described in the referenced page involve editing the Windows registry. Making an error when doing this can damage your operating system making the computer unusable. As a minimum ensure you back up the registry before making changes. If you are not confident of your ability to make the changes safely it is recommended that you do not attempt them.