Word saving and microphone problem

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I am trying to save a word document, but the message keeps on popping out
saying: "The document was saved, but data for speech recognition was lost
because there was not enough space to store it. Be sure to turn off the
microphone when you are not recording, and check the available storage space
on the disk."

I don't understand what is going on.

 

[Suzanne S. Barnhill]

Do you have Speech Recognition enabled? A microphone turned on?