Looks like my hard drive is dead. Fortunately, I'm under warranty, so I can get a new one, but it may take as long as February 5 before I have it in my hands. Until then, I'll be using my old computer, whose sole virtue is that it's functional. I'll try to stay on top of things until my main computer is operational again, but I expect my productivity will be much lower until then. My apologies for that in advance.