UNetbootin allows you to create bootable Live USB drives for a variety of Linux distributions from Windows or Linux, without requiring you to burn a CD. You can either let it download one of the many distributions supported out-of-the-box for you, or supply your own Linux .iso file if youve already downloaded one or your preferred distribution isnt on the list.
UNetbootin can create a bootable Live USB drive, or it can make a "frugal install" on your local hard disk if you dont have a USB drive. It can load distributions by automatically downloading their ISO (CD image) files, or by using existing ISO files, floppy/hard disk images, or kernel/initrd files, for installing other distributions.
UNetbootin can also be used to load various system utilities, including:
* Parted Magic, a partition manager that can resize, repair, backup, and restore partitions.
* SystemRescueCD, a system repair, backup and recovery tool.
* Super Grub Disk, a boot utility that can restore and repair overwritten and misconfigured GRUB installs or directly boot various operating systems
* Dr.Web Antivirus, F-Secure Rescue CD, and Kaspersky Rescue Disk, which remove malware from Windows installs.
* Backtrack, a utility used for network analysis and penetration testing.
* Ophcrack, a utility which can recover Windows passwords.
* NTPasswd, a utility which can reset Windows passwords and edit the registry.
* Gujin, a graphical bootloader that can also be used to boot various operating systems and media.
* Smart Boot Manager (SBM), which can boot off CD-ROM and floppy drives on computers with a faulty BIOS.
* FreeDOS, which can run BIOS flash and other legacy DOS utilities.

Installation & Screenshots
1. If using Windows, run the file, select a distribution, floppy/hard disk image, or kernel/initrd to load, select a target drive (USB Drive or Hard Disk), then reboot once done.
2. If using Linux, make the file executable (using either the command chmod +x ./unetbootin-linux, or going to Properties->Permissions and checking "Execute"), then start the application, you will be prompted for your password to grant the application administrative rights, then the main dialog will appear, where you select a distribution and install target (USB Drive or Hard Disk), then reboot when prompted.
3. After rebooting, if you created a Live USB drive by selecting "USB Drive" as your install target, press the appropriate button (usually F1, F2, F12, ESC, or backspace) while your computer is starting up to get to your BIOS boot menu and select USB drive as the startup target; otherwise if there's no boot selection option, go to the BIOS setup menu and change the startup order to boot USB by default. Otherwise, if you did a "frugal install" by selecting "Hard Disk" as your install target, select the UNetbootin entry from the Windows Boot Menu as the system boots up.

Removal Instructions (Applicable only to Hard Disk / "frugal installs")
If using Windows, UNetbootin should prompt you to remove it the next time you boot into Windows. Alternatively, you can remove it via Add/Remove Programs in the Control Panel.
If using Linux, re-run the UNetbootin executable (with root priveledges), and press OK when prompted to uninstall.
Removal is only required if you used the "Hard Drive" installation mode; to remove the bootloader from a USB drive, back up its contents and reformat it.
Uninstalling UNetbootin simply removes the UNetbootin entry from your boot menu; if you installed an operating system to a partition using UNetbootin, removing UNetbootin will not remove the OS.
To manually remove a Linux installation, you will have to restore the Windows bootloader using "fixmbr" from a recovery CD, and use Parted Magic to delete the Linux partition and expand the Windows partition.
Installing Other Distributions Using UNetbootin
Download and run UNetbootin, then supply it with the appropriate ISO (CD image) file, floppy/hard disk image, or kernel and initrd files when prompted (see screenshot). Check your distribution's download page to find the appropriate file; if in doubt use the ISO file.

The license of this software is Free, you can free download and free use this boot cd software.