Reinstall Internet Explorer (IE). The process for reinstalling the Internet Explorer web browser differs depending on the version of the browser you are using (e.g. 6, 7 or 8) and the version of Windows you are running (e.g. Windows XP or Windows Vista). Follow the reinstallation instructions on Microsoft's support website (link in the Resources section). Typically, the process involves restarting your computer using the Windows installation disks and reinstalling a clean copy of IE on the system level.