I have a new Dell XPS L501 i5 with Windows 7 Home Premium 64bit. Each time I open the laptop, and start up, if I do not touch the keypad the screen goes to sleep after 3 minutes. Each day I alter the Power Saver option in Control Panel re "screen sleep after" to 30 minutes, and of course save the change, and yet on re-starting after shutdown the screens sleeps again after 3 minutes! I am getting very frustrated. Please can someone help?