The computer insists that all is well, even though the sounds don't work. I rolled the computer back to the day just prior to when I ran MWB and the card is now working again. So something in malware bytes must have caused the sound card to be cut out, or it might have been one of the automatic updates by MS. I have had other problems with those auto updates on other computers, so I suspect that might be the case here.
Anyway, thanks for the help, appreciated as usual. I will keep an eye on it, since whatever caused the problem might come back next time the computer does the update that failed last time. (what a convoluted sentence!)