I tried using the Windows 7 USB/DVD Download Tool to install Windows 8 RTM from a jumpdrive. For some reason, I couldn’t get it to work properly/boot with an error code saying that an operating system was not detected.
Anyway, I manually created a USB stick with great success as 7/Vista before it:
1 – Open an Elevated Command Prompt and run the following commands in order:
diskpart list disk select disk # (where "#" is your jumpdrive) clean create partition primary select partition 1 format fs=ntfs quick assign exit
2 – Mount an .ISO (now built into Windows 8 with a simple double-click!) or insert a DVD of Windows 8 into your computer.
3 – From the Elevated Command Prompt, change to your optical drive/mounted ISO. (cd X) (where “x” is your drive’s assigned letter)
4 – Change directory again to boot (cd boot)
5 – Run the following command: bootsect.exe /nt60 X: (where X: is your jumpdrive’s assigned letter, viewable from Computer)
6 – Copy the contents of the DVD/mounted ISO onto the USB stick.
7 – Make sure USB keys are supported by your system’s BIOS, and install Windows.