Hello,
Could you please run cmd.exe as root (Administrator) and show us the result of the following commands:
sc qc nxaudio
sc query nxaudio
C:\Program Files (x86)\NoMachine\bin\nxdeviced64.exe –status nxaudio
C:\Program Files (x86)\NoMachine\bin\nxdeviced64.exe –uninstall nxaudio
C:\Program Files (x86)\NoMachine\bin\nxdeviced64.exe –install nxaudio
and see if the problem still occurrs. Thank you.