Can't Record Audio

Hi, I just downloaded the latest version of Audacity Version 2.2.2 and I am using Windows 7. I have a Udemy video that I bought and was trying to record just the audio portion of it. But then I get the error message: Error Opening Sound Device; Try changing Audio Host, Record Device, or Project Sample Rate. Not sure how to do any of those. Has anybody had this problem before?



The text from the second link will be included in the upcoming 2.3.0 Manual.