Boot ISO from USB drive

Let's say you want to boot a computer without a cd drive. You have the option to boot from an USB drive. If you want to boot an ISO from an USB drive, you need diskpart for this. I will tell you what to do, it ain't rocket science.

• Open a command prompt
• Start diskpart
  Diskpart
• Check what disks are available
  List Disk
• Check what number your USB drive has and select it
  Select Disk 1 
• Clean the USB drive
  Clean
• Create partition
  Create Partition Primary
• Make the partition active
  Active
• Format the USB drive
  Format fs=ntfs quick
• Assign a drive letter
  Assign
• Copy the contents of your .iso to your usb drive... and boot fromit

   

Another option is downloading Windows 7 USB/DVD download tool. 
This tool will automate this task for you.