Open Registry by going to START-RUN and typing REGEDIT. Navigate to : HKEY_CURRENT_USER\CONTROL PANEL\DESKTOP and look for AutoEndTasks. On my computer default value is 0. Change it to 1. Thats all. Further more you can reduce the time it takes for Windows to issue kill directive to all active/hung applications. In doing this only constraint that you should make sure exists is that HungAppTimeout