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Lost sound driver in HP Touchsmart AIO when upgrading from 7 to 10
I obtained this (rather older) desktop AIO with Win 7 and I just upgraded to Win 10. In the process, the sound driver disappeared. I have googled with nothing helpful turning up. I got a popup type message saying that no sound device (or words to that effect) could be found and it offered to diagnose. I have run the diagnostic with no cure offered and, not being very tech savvy, do not know what to do next. What information can I provide? I will be grateful for any assistance