I am running Win XP SP3. Recently, when defragging, the screen went blank. No response to mouse movement or ctrl, alt, del. I had to switch off the mains and start again. It also happened earlier when I was rendering a film from my camcorder to dvd. Any ideas please?
As you're running XP I guess that the computer is quite old.Overheating is a strong possiblitiy Open it up and clean the dust out especially the cpu cooler and fan. Clean paint brush (about 1" is best) and a vacuum cleaner are ideal for this. Try cleaning as much out of the psu as you can too. Unplug from the mains first of course.