Low Recording volume

When I try to record using the microphone input on my Windows 7 laptop the monitor sound is very clear and the record level monitor seems to be correct but the recorded volume is very low, being almost a flat line. I’ve tried various settings in Audacity and on the Windows sound settings but I get the same result. Can anyone help please? I have the latest version of Audacity 2.1.1

Are you recording from the internal mic or an external mic that is physically connected to the computer?

Make sure you choose the correct recording source in Device Toolbar.