Well I have always had problems with my computer crashing, and was always happy to easily exit the problem using the 'Ctrl, Alt and Delete' buttons.
Now I have a problem, my dam 'Ctrl, Alt and Delete' buttons don't work anymore.

And when my computer freezes I need to swicth it off at the mains which is a real bitch, especially when I have got other windows open from making images.
Is there an actual way that this can be worked again, like maybe I turned the controls for it off one time and theres a way to switch the controls back on or something? Stupid question but it a day to day bug that really anoys me!