After following those steps, 'adb devices' still returns an empty list and to make it worse, when I connect my Nexus 10 to my PC, Windows doesn't show any folders within the device. I attempted to follow this recommendation, because it was identical to a suggestion I had previously found here on Stack Overflow.
When I run 'adb devices' from the command terminal, it doesn't list any devices. I have checked the setting on my Nexus 10 for 'Unknown Sources'. I have downloaded the Android SDK, installed 'Android SDK Tools', 'Android SDK Platform-tools', and Google USB Driver. I am attempting to install an Android app on my brand new Nexus 10.