How to create a bootable dos usb drive

Step1: Create Bootable USB Drive

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

Insert the USB drive you intend to boot from.

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.

In “Create Bootable USB Drive” dialog, click “. ” button to open the iso file of Windows operating system.

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

Choose the proper writing method. “USB-HDD” is recommended.

Click “Start” button to start creating bootable USB drive.

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!

Step 2: Configuring the BIOS

You should now reboot and go into the BIOS configuration to boot from USB. Instructions for doing so vary wildly from system to system, but generally entail the following:

Reboot the system.

While booting (before Windows starts loading), get into the BIOS configuration screen by hitting something like F1, F2, Delete or Escape. Hotkey instructions are generally provided on the screen.

Go to the section that contains your boot devices.

With your USB drive plugged in, the USB drive should be listed. If it isn’t, your system might not support booting from USB. Assuming that it is supported (as is the case with virtually all modern hardware), promote your USB drive to the primary boot device.

Exit from the BIOS configuration, saving all changes.

Please notice that you can seriously screw up your system by providing incorrect BIOS settings!

Step 3: Booting and setup windows from USB drive

Assuming that you properly configured your BIOS and your USB drive supports booting, Windows setup should now load. Depending on the speed of your USB drive, this may take a while.

If it isn’t working, then double-check the following before making a scene:

Is your BIOS properly configured for booting from the USB device? (Is the USB device listed and does it have top priority?)

Have you correctly prepared the USB drive in step one? (Restart the procedure.)

Does your USB drive properly support being booted from? (Try another one!)

If your computer has become unresponsive or is infected with a serious virus, you may find your only option is to reinstall the operating system. You can create your own operating system boot disk on a USB flash drive if you no longer have the original boot disk. Setting up the USB drive as a boot disk is an easy procedure, but you first have to make sure the drive is properly formatted. Once the USB drive is prepared, you may also need to change a setting in your computer so it can boot from the drive.

Step 1

Plug the USB drive into a USB port on your computer. Click “Open a folder to view files.” Transfer any files currently on the USB drive to your computer’s desktop, as they will be deleted when the drive is formatted.

Step 2

Open the Start menu and select “My Computer.” Right-click the USB drive in the list of available drives. Click “Format.”

Step 3

Choose “FAT32” from the drop-down menu and click “Start.” Click “OK” once the format process has finished.

Step 4

Navigate to the Resources link that contains operating system boot disk download files. Download the appropriate boot data for your computer’s specific operating system.

Step 5

Click the boot file and drag it into the USB drive’s folder. Close the folder and restart the computer. Wait to see if your computer automatically attempts to boot from the USB drive.

Step 6

Restart the computer again if it doesn’t boot from the USB drive. Press the “F2” key, or whichever key your system uses to access the BIOS menu, as soon as the manufacturer logo appears on the screen.

Step 7

Scroll over to the BIOS menu labeled “BIOS,” “Advanced” or something similar. Scroll down and highlight “Boot Device Order.” Press Enter.

Step 8

Highlight “USB” and press Enter. Press the key to save your changes and restart the system, which is usually F10.

Follow the boot instructions that appear on the screen to load your operating system from the USB boot drive.