Problems uploading to board

We have an Arduino Nano board. We are using Windows 10. We have programmed an LED on it. When we connect the board to the PC, it says, "Problem uploading to the board." I have tried resetting the board. I have tried a different USB cable. The boot loader is loaded properly. I don't know why we keep having problems uploading to the board. Any advice would be greatly appreciated. Thanks much.

Maybe it's a driver problem, or lack of one.

Have you tried the Loopback test?

Okay, we'll try those suggestions. Thanks.