WinToFlash is a free software that allows users to create bootable USB drives for Windows installation. It supports various versions of Windows, including Windows XP, Vista, 7, 8, and 10. The software also includes a wizard-based interface that guides users through the process of creating a bootable USB drive, making it easy to use even for those with little technical knowledge. Additionally, WinToFlash can also create a backup of the USB drive, ensuring that users can quickly restore their bootable USB drive if necessary.