BleepingComputer.com: Unable To Type Into Internet Explorer 7 (vista)

Yesterday, when I went to enter a site into Google browser, Internet Explorer was shut down and a message appeared saying the system had a problem and needed to shut down. Since then, following all the 'troubleshooting' steps given at their support site, nothing has rectified this problem. Specifically, Internet Explorer works without flaw except for my being unable to type a single character. The instant I attempt to, the screen becomes glazed over with fog and the error message appears before shutting down. Any ideas? Thanks