I have no idea what this is really. Try to reboot first. If that does not work then try a fresh install and let us know if it works.
Try to unplug and replug your microphone.
If not, then maybe you have corrupted something in your Windows installation? You can try to see if Windows built in speech recognition works.
You can try to uninstall and reinstall your language packs. How you do this will depend on which version of Windows you are using.