Some users reported that copy-paste was not working in a particular app while others said it wasn’t working across Windows 10 OS. Of course, you must've unplugged and re-plugged your external keyboard a few times. Everything seems fine until copy-paste stops working on your Windows 10 computer. We use it several times daily to make our work easier. It’s as simple as hitting the Ctrl+C and then Ctrl+V shortcuts on your keyboard. The copy-paste function in Windows 10 is often taken for granted.