Hi rvariar,
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I see that you are getting a 'No Audio Output device installed' and I will be happy to help. This could be cause by an issue during the upgrade. The upgrade process should have automatically created a restore point to go back to Windows 8 and then try upgrading again.
You can try a Hard Reset to see if a clean restart resolves the issue. You can also try Refreshing your Windows and see if that helps at all. Let me know how it goes.
Thank you,