How to create a bootable pen drive

To Create a bootable pen drive you need to have the following:

1. A Personal computer 

2. Get a copy of Windows installation disk
You can download an ISO file from Microsoft store. An ISO file combines all the Windows installation files into a single uncompressed file.

3. You need a USB drive with a minimum of 8GB of free space

4. PowerISO (v6.5 or newer version, download here).


Now, follow the steps below to write a bootable pen.

1. Start PowerISO 
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 above 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 operating system.
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 bootable USB drive.
   
8. PowerISO will alert you that all data on USB drive will be destroyed. Click "OK" to continue.
   

The program will start writing USB drive, and showing the progress information. You should get the message "Writing USB drive completed successfully." after the operation completes

If no errors occurred in the above process, you should now be all set to setup Windows from USB drive!