A. Microsoft offers the Windows 7 USB/DVD Download Tool, which takes the ISO image of a Windows 7 installation media as its input and writes to a USB device (or DVD), enabling installation from the USB stick. Using the tool is a basic two-step process—just select the ISO file and the destination and the tool will create your drive, as shown here.
Related Reading:
Check out hundreds more useful Q&As like this in John Savill's FAQ for Windows. Also, watch instructional videos made by John at ITTV.net.