When I lock the computer console (CTRL+ALT+Del - Lock the computer in XP), everything is fine, time limit is not spent. When I hibernate a computer, time is counted and limit can be gone very soon, although the computer is turned off (certainly I am familiar about the difference between hibernation, standby and shutting down). My concern is, that it is practical to leave my work on the screen, have a break for hours, but not loose the time limit and don't spend electricity for keeping the computer ON.