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Dac not seen after Win 10 system image rollback (1607 fail to 1511)
I've had some 1511 to 1607 update "stuck" failures the past couple of weeks and have rolled back using a repair disk and a system image backup. The thing that's happened afterward both times is that my dac, which is connected to a USB PCI sound card in my desktop computer, is not being seen by Windows Sound or in Device Mgr. OTOH, the NVIDIA and Reaktek drivers do show (as they should). Moving the USB cable to a mobo USB port gets the dac to show, but actual sound only plays for a brief moment (1 second) before stopping. I've tried to reinstall the dac's USB driver with it connected to the sound card, but it always gives an error message that the dac needs plugging in, which of course it already is. Replugging doesn't change that result. So I'm stuck.
The first time this happened with Win 10 last week, I tried unplugging and replugging the USB connector here and there, disabling the other sound drivers, and rebooting a number of times, all without success. That is, until all of a sudden the dac appeared again as it should. It's as if it corrects itself by some kind of magic (same sense as when it occurred while reinstalling Win 8.1 a couple of years ago). And since last week it's remained ok until this morning, when after Windows tried an OS upgrade that hung, I rolled back via a system image. I've also tried Yamicsoft's Win 10 Mgr repair module, without success.
What I'm trying to figure out is if there's some logic in the way Windows handles this that will allow me to get the dac recognized. Any ideas? Thanks,
Last edited by highstream; 22 Jan 2017 at 17:18.