1.     Insert a USB flash drive into a running computer.

2.     Open a Command Prompt window as an administrator.

3.     Type diskpart

4.     In the new command line window that opens, to determine the USB flash drive number or drive letter, at the command prompt, type list disk, and then click ENTER. The list disk command displays all the disks on the computer. Note the drive number or drive letter of the USB flash drive.

5.     At the command prompt, type select disk <X>, where X is the drive number or drive letter of the USB flash drive, and then click ENTER.

6.     Type clean, and the click ENTER. This command deletes all data from the USB flash drive.

7.     To create a new primary partition on the USB flash drive, type create partition primary, and then click ENTER.

8.     To select the partition that you just created, type select part 1, and then click ENTER.

9.     To format the partition, type format fs=ntfs quick, and then click ENTER. and the type active and click enter.

Step 2: Configuring the BIOS:

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

1.     Reboot the system.

2.     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.

3.     Go to the section that contains your boot devices.

4.     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.

5.     Exit from the BIOS configuration, saving all changes.

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.