- Make sure your Windows OS is up-to-date
- Make sure your drivers is up-to-date
- Trey selecting and re-selecting between different audio devices and replay sound.
It also might be that there is some common problem with Windows, if the service is not starting after procedures above.
- Run command line as admin and execute command "sfc /scannow" and let it run. Reboot after that.
- Last step would be try to fix it with dism by entering at command line (run as admin again):
DISM /Online /Cleanup-Image /CheckHealth