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After reading around in other forums, the audio issue could be related to Intel graphics drivers.
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(Code 10)" for High Definition Audio Controller. Device manager shows " This device cannot start. There is no sound from the speakers or headphones. Everything works except for the below listed below. After installing Windows 10, I installed the latest v6 of Bootcamp drivers and support software. I was able to successfully install Windows 10 using EFI method. I used this guide to install Windows 10 using EFI method:
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