I had some strange sounds coming over my speakers and thought it might be one of my recording devices (my built in mic, etc) acting up. To troubleshoot this I brought up the Sound window, clicked on the Recording Tab and right-clicked on each of my recording devices to disable them. It turns out my problem was caused by something else and was easily fixed, but now I have a new issue. How to I enable my recording devices. If you check the Recording Tab in the Sound window, there are no devices listed. Maybe I can enable them directly from the Device Manager. Nope, nothing listed there either...
The solution is fairly simple, but seems to be completely non-standard for windows. Go back to the Recording Tab in the Sound window and right-click in the now blank tab. You should get a context menu that has two options (Show Disabled Devices and Show Disconnected Devices.) Click on Show Disabled Devices and you should now be able to see and enable your devices.
Not a huge issue, but fairly annoying since it is done differently than most other places in Windows (i.e. The network device screen. Disabled devices are still visible but are disabled...)