Restart desktop with a single button press

Hi,

I use a lot of macro's during my show and i often have desktop crashes.
Even when i use a macro-speed of 0.15. (4 crashes in a 6 hour show)
In the begin it was very annoying but i've used to deal with this problem..........

I would be very nice if we could hold a single button to restart the desktop after a crash (for example the setup-key for 5seconds).

Thanks