Then Chris said: "every year there are students who forget to save and back up their work". Well I won't let that happen to me I thought to my self. I will just finish the long board then work out where to save it to. A bit later and without physical input from me ( I have witnesses) my computer "spat the dummy" and I saw the blue screen of death, then a very blank screen. Not a great way to finish my first day's introduction to Autocad - though it can be argued it was a good lesson!