Install Windows 8 from Pendrive (Using Command line)

Step 1: Plug in your Pendrive to your Computer.

Step 2: Format your Pendrive to NTFS. Important: If you Format to FAT or FAT32 this trick won’t work. So please select NTFS from the Format Dropdown option. 

Step 3: Now in Windows 7 Go to Start Menu and Search CMD . Right click on CMD and Click on RUN AS ADMINISTRATOR. Note: This is very important . Without Administrator Privilages this trick doesn’t work. If you are already in a Windows 8 machine and want to install a fresh copy of Windows 8 then PRESS and HOLD WINDOWS KEY + X in Windows 8. Now click on “Command Prompt (Admin)“. 

Step 4: Now write Below commands and Press ENTER after each of them :

Type diskpart and Press Enter
Type list disk and Press Enter
Type select disk 1 and Press Enter
Type clean and Press Enter
Type Create partition primary and Press Enter
Type active and Press Enter
Type format quick and Press Enter
Type assign and Press Enter

That’s it. Now just reboot your PC and configure your BIOS options to set First Boot Priority to USB HDD. Save this settings. Don’t know how to configure Bios Settings? Press Restart button in your start menu from windows 7 . After computer shut down and it begins to start up press ESC button continuously and you will be prompted to the Bios setting. If ESC button does not bring to Bios setting then try F11 button. Please note that Bios option button varies PC to PC and Laptop to Laptop. You can check which one work for you from the very first window come up when you Start your Computer.