Optical drives have gone the way of floppy drives. I haven’t connected a Optical drive to any of my desktops in years. In a world where everyone(Apple, Valve, Microsoft..etc.) has moved to digital content delivery; the optical drive is now a lowly peripheral device. Here is quick guide on installing Windows 8 via USB.
Things you will need:
1.) Windows 8 ISO image: Whether you got your ISO image through the Microsoft upgrade assistant, TechNet, MSDN subscription, or a digital download of some kind, all will work.
2.) A USB drive, at least 4 GB in size.
Download and Install the Windows 7 USB/DVD tool from Microsoft.
Although this tool was released for Windows 7, it works with Windows 8 as well.
Open the ‘Windows 7 USB/DVD tool’ and create a bootable Windows 8 USB drive.
Insert a 4GB+ USB drive and open the Windows 7 USB/DVD tool. Run through the simple wizard, where you will be asked to browse and select the Windows 8 ISO file and select the USB drive. Note: USB drive will be wiped, so save anything important. The utility should take you through the following steps:
Restart your machine, change the boot order. Install Windows 8.
a.) Go to BIOS/UEFI and change the System boot order: In order to change the system boot order, restart your system; and while its restarting, frantically keep tapping F2 and the Delete key. One in BIOS/UEFI, make the USB drive the first boot priority device. Save Changes. Restart. Windows setup should begin.
b.) Install Windows via the exceedingly simple installation wizard. Installation should take about 20-25 min.