I'm on the verge of re-installing Windows. Spent the last 4 hours searching on here and other forums for a fix, but can't seem to find any.
It started earlier today, I'd just installed Call of Duty: World at War off Steam, tried to launch it and it kept crashing. Tried a few things, but nothing worked and read it might be a sound driver issue. Tried updating my ASUS Xonar DX drivers to the latest version, but once the PC had restarted I had no sound and a the speaker on the taskbar said there's no output device installed.
Uninstalled these drivers and tried installing the ones I was using and same problem. I opened up playback devices and the default speakers were my monitor as I connect via HDMI from my graphic card to my main monitor. The "set default" option was greyed out and I couldn't change the default speakers unless I disabled the HDMI audio, but still I had no sound.
Tried uninstalling the graphic drivers and re-installing the drivers first, but still nothing. Even when the only audio device was the sound card, there was no sound.
If I troubleshoot, it says the audio device is disabled, even though it isn't. I've checked all the audio services and they're all running. I even tried enabling my onboard audio again, but I still get the same problem of the audio device apparently being disabled.
I ran an sfc /scannow, and that fixed a few things, but still no audio.
Only thing I can think of doing now is just re-installing Windows.