Fx \Audio not working; all troubleshoot fails, system says 'no audio device found'

If this is the result of installing or uninstalling FxSound, then we owe you an apology.

I don’t think that’s necessary; it’s probably best to keep the updates active.
What I was referring to, was the option to restore from a system restore point:

However, as I mentioned, this is not something to take lightly, and you should take the time to carefully review the rollbacks made to your system for each restore point.
Also, before you try that, please try manually removing the FxSound driver. You can find the instructions under bullet point 21 of my list; this is the link to the original thread: