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I have a Realtek High Definition Audio sound card and Windows 7. It works fine both when playing and recording.
However when I connect to other computer, which has Windows 10 installed, via RDP and set Remote Audio setting to 'Record from this computer' and go to Sound settings I see that the microphone is working in 'Test your microphone' bar but only for a few seconds and then it stops working. When I go to Manage sound devices and disable/enable it - it work again for a few seconds, then stops. It behaves the same in Skype.
What can be wrong?