How do I install Windows 10 without an optical drive?

Solution
You can download the ISO to USB using a program from Microsoft, it basically does everything for you. Then insert USB in new PC, ensure USB is selected as a boot drive in your BIOS and away you go. You can even buy it already saved on a USB stick if you want.
You can download the ISO to USB using a program from Microsoft, it basically does everything for you. Then insert USB in new PC, ensure USB is selected as a boot drive in your BIOS and away you go. You can even buy it already saved on a USB stick if you want.
 
Solution


Where would you recommend to buy it pre-installed?