If the OS loads and uses its own drivers to access the controller, the emulated CD is no longer accessible, then the OS would not fully boot. BootMyISO: creates a bootable ISO file on a USB flash drive supports some bootable ISO files.UNetbootin: creates a bootable live USB flash drive supports a variety of Linux distributions.Novicorp WinToFlash: creates a bootable Windows installation or live USB flash drive supports Windows XP, Windows 2003, Windows Vista, Windows 2008, and Windows 7 installation CD or DVD, and live CD or DVD (WinPE or BartPE).Microsoft Windows 7 USB / DVD Download Tool: creates a bootable Windows 7 installation USB flash drive supports Windows 7 ISO file only.While searching a free tool to create a Windows 7 bootable ISO file on a USB flash drive, I find the following applications: