Open Task Manager and go to the processes tab, click the taskbar button and see if the application loads in Task Manager. Also, check to see if any other processes are hogging any of your resources (eg: A single process that is either pegging the cpu or memory [over 25% cpu load for at least 15s constant, or with no applications open, just on desktop with task manager open, any processes exceding 250mb memory usage for 15s constant)