Create Bootable USB Drive

Step1: Create Bootable USB Drive:

1.      Start PowerISO (v4.8 or newer version, download here).

2.      Insert the USB drive you intend to boot from.

3.      Choose the menu "Tools > Create Bootable USB Drive". The "Create Bootable USB Drive" dialog will popup. If you are using Windows Vista or Windows 7 / 8 operating system, you need confirm the UAC dialog to continue.

4.      In "Create Bootable USB Drive" dialog, click "..." button to open the iso file of Windows 7 or Windows 8.

5.      Select the correct USB drive from the "Destination USB Drive" list if multiple USB drives are connected to the computer.

6.      Choose the proper writing method. "USB-HDD" is recommended.

7.      Click "Start" button to start creating windows 7 / 8 bootable USB 
drive.