Windows Subsystem for Linux Kernel Update Package contains the Linux Kernel update package to upgrade Windows 10 64-bit to WSL 2 (Windows Subsystem for Linux), allowing you to run Linux on Windows 10 with WSl 2.
Windows 10 currently has either WSL 1 (Windows Subsystem for Linux) or WSL 2, depending on your build of Windows. If your copy of Windows 10 is up to date, the best Windows Subsystem for Linux (WSL 2) is installed but will require an update. Before proceeding, you should already be running Windows 10 2004 or later, and this tutorial assumes that. Microsoft plans to add support for Windows 10 1903 and 1909.
MultiBootUSB is a software installer that allows the user to install multiple Live Linux Distros to a single USB drive/Pendrive/Flash drive and boot from it.