How to install WLS 2 on Windows 10.
*Note* - The issue encountered at the end appears to be limited to Virtualbox instances of Windows 10 and WSL2. One work around is to change to wsl version 1 after the initial `wsl --install` command. After installing wsl, open a non-privileged command-line and type `wsl --set-default-version 1` and press ENTER.