There could be various reasons on why the device has lost audio capabilities.
Archive for Microsoft
Lenovo: An exclamation mark next to Software Guard Extensions Device after upgrading from Windows 10 (1607) to Windows 10 (1709) – ThinkPad
After upgrading the operating system from Windows 10 (1607) to Windows 10 (1709), an exclamation mark ! is displayed next to Software Guard Extensions Device in Device Manager.
Lenovo: How to enter or boot to Safe Mode in Windows 7, 8, 8.1 and 10
Safe mode is a troubleshooting option for Windows that starts your computer in a limited state. Only the basic files and drivers necessary to run Windows are started. Safe mode is useful for troubleshooting problems with programs and drivers that might not start correctly or that might prevent Windows from starting correctly.
