Having a bootable USB is very essential, especially if your computer doesn’t come with a CD/DVD drive. Using bootable USB drive to install an operating system not only makes the installation faster, but also saves a DVD. You can boot to the USB drive, using it to run the OS setup program, just like a CD or DVD.
Here are the best free tools that allows you to create a bootable USB drive from ISO image. You can burn an ISO of an operating system to a USB drive and install Windows or Linux on a computer.
Option 1: Windows 7 USB/DVD Download Tool
Windows 7 USB/DVD Download tool is an official, freeware tool from Microsoft that allows you to burn and write the Windows 7 ISO image to a physical DVD media, USB flash drive (or USB stick), or external and portable USB hard disk, and ensuring the DVD or USB drive is bootable. Been bootable mean the media allows users to install Windows 7 after starting up computer directly without having to first run an existing operating system on the machine.
Option 2: Universal USB Installer
Universal USB Installer is a Live Linux USB Creator that allows you to choose from a selection of Linux Distributions to put on your USB Flash Drive. The Universal USB Installer is easy to use. Simply choose a Live Linux Distribution, the ISO file, your Flash Drive and, Click Install.
Option 3: ISO2Disc
ISO2Disc is a simple ISO burner software to burn your ISO image file to CD/DVD disc or USB flash drive. It’s the best and most essential free software that allows you to create a bootable USB flash drive from a Windows XP, Vista, Windows 7, Server 2003, or Server 2008 installation CD or DVD. It will also transfer a Windows pre-install environments (WinPE), which are handy for troubleshooting and repairs, to a USB flash drive.