How to create installation media for a PC refresh or reset
If you need to perform a PC reset or reinstall Windows 8 and don't have installation media, you can create it using the Windows 8 Setup program. To create media you need to use a PC running Windows 7 or Windows Vista that has the same architecture (32 or 64-bit) as the PC you want to reset or re-install Windows on. You'll also need your Windows 8 product key.
You can find your product key in your online order info, in the confirmation email for your purchase, or on the DVD packaging. The product key will look something like this:
XXXXX- XXXXX- XXXXX- XXXXX- XXXXX.
Once you have your product key and are on a PC running Windows 7 or Windows Vista, follow these steps:
Run the Windows 8 Setup program.
When prompted to install Windows 8, select Install by creating media, and then click Next.
Select the type of media you want to use: either a USB flash drive or a DVD.
To create a USB flash drive
Click USB flash drive.
Plug the USB flash drive into a USB port on your PC.
When prompted, select the USB drive you want to use and then click Next.
If you have files on the USB flash drive, they'll be deleted.
To create a DVD
Click ISO file and then select the location to save the ISO file.
Insert a blank, recordable DVD into your DVD drive.
Burn the ISO file to the DVD using Windows Disc Image Burner, or another DVD burning program.