ctrl+alt+del

a slow start to my day...trying to avoid the onset of a 'man flu' - so far I'm winning.
Walked to work & whilst there were plenty of puddles to possibly photograph, it was nice to just walk.
Got to work then found myself sitting on a ward waiting for the patient to arrive...to avoid wasting all my time, I whirred up the computer to do some mandatory learning. I got about 15mins into it when the computer began to 'do its own thing' at the end of which this screen appeared. Nothing I did would change it (including the obligatory press every button like a child on a piano technique)

when i left 4hrs later it still flashed ctrl+alt+del