Suddenly, I cannot use Firefox 8.0.1. Keyboard input fails after a few characters. Sometimes (but not always), mouse input fails as well. The only button that works when this happens is the "X" (close program) button in the top right corner of the window. The only things I changed recently were adding FlashGot and Windows Media Player plugins. Firefox worked after each installation and continued to work for at least a couple of days. Did a complete removal including personal settings, clean installed 8.0.1 without any personal settings, but the problem persists. I have no other keyboard or mouse input problems with any other browser or programme. (I am submitting this on Chrome browser, and everything is fine.)