Well, being informed that the dancing about of the warning IS a Windows 7 and 8 response to a USB error, we concluded it could be due to a USB failure, or a software or third party hardware issue, and a system files scan proved no flawed Windows files. This left the possibility of a flaw in the USB ports, and a hardware scan (several varieties) turned up no malfunction. We were left to conclude a flaw in third party attached equipment had some responsibility, and indeed we produced a physical failure of the headphones. Now we do not know whether the computer killed the headset or the headset, in dying, attempted to kill the computer.

We also used a USB analysis freeware to locate every single USB transaction in the past several months and to wipe that slate clean, out of memory, so that if the computer has somehow failed to disconnect one of these devices, they are not now part of memory.

So we are rethinking sending the machine in, with all the attendant disruption in our lives should they wipe the system and data. The best test seems to use the daylights out of the machine today and tomorrow, get a new inexpensive headset locally, and see if we can provoke that error again, or whether the fault lies somewhere between the defunct headset and the computer’s memory of several hundred USB transactions.