Universal USB Installer is a versatile and user-friendly tool for creating bootable USB drives for Windows 11 and 10. Once you have created a bootable USB flash drive, you can test it without installing it on your computer or laptop. If you don’t love to use any tool to make a bootable Windows OS, you can refer to the complete guide on downloading and creating a bootable USB flash drive of Windows 10 version 20H2. It is a convenient tool if you don’t have DVD / bootable ISO and want to install/reinstall Windows 11/10/8.1/8/7/Vista & Windows Server on your computer. Apart from the installation/reinstall, this free software can clone your Windows operating system from one HDD to another or clone the operating system from HDD to SSD. WinToHDD is another freeware utility to install and reinstall the Windows operating system without using a CD/DVD or USB drive.