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#11
It finally occurred to me the screen shot you posted showed the "Turn off hard disk after" setting was "Never". I set the setting to "Never" on my PC.
The computer was in use last night for about three hours, and again this morning for over two hours so far. The problem has not recurred. I don't understand why the fix worked, but apparently it has. I am most grateful for your help.
Thank you very much!