UNetbootin for Windows is a free and open-source utility that lets you create bootable USB drives or hard drives. Instead of needing to download an ISO image of an operating system (like Linux, Windows, or a recovery disk) and then using a separate tool to burn it to a drive, UNetbootin handles the whole process.

It works by :

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Downloading an operating system ISO:

You can tell UNetbootin the name of the operating system you want to install (it has a built-in search) and it will download the ISO for you. Alternatively, you can point it to an ISO you already have downloaded.
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Creating a bootable drive:

UNetbootin then writes the ISO[SQ]s contents to the selected USB drive or hard drive partition, making it bootable. This allows you to start your computer from that drive and install the operating system or run a live environment.

In essence, it simplifies the process of creating bootable media for various operating systems and other bootable applications. It[SQ]s a convenient alternative to using more complex tools or command-line methods.