one gets this error when not letting something to load compleatly stop all services if you recive an error after trying to stop services then reboot your computer then run wamp again do a start/stop/start/reboot all servers (that that order) if it doesn't go white then open localhost in a browser if you get any page then click "mysql" then log and see if there is any error if you cannot see anypage click view the apache and php error logs and post them