If you bought Windows 8.1 or Windows 8, you can download and install Windows from this page using just your product key
Have your product key handy. You can find it in your online order information, in the confirmation email for your purchase or on the DVD packaging. The product key is a 25-character code that looks something like this:
XXXXX- XXXXX- XXXXX- XXXXX- XXXXX.
Technorati Tags: dowmload windows 8 or 8.1 ISO,Lost DVD process