Was on night shift and got a phone call from my 9 yr old son who told me he had a big problem with the home PC, (not uncommon in those days with Windows 3.1).
I was busy (briefing for a flight), and wasn't really listening to the details and asked him to press Clear-Alt-Delete and ring back if it didn't cure the problem.
He said he would. One minute later he called back "No, it's not fixed!" said he.
I said to switch it off at the wall and back on again and ring back if that didn't cure it.
Another minute, he rang again. "No", says he - "It's worse, there's still smoke coming out of the back, now I can see flames!"
"Fetch your mother!" said I........