Physical DVD drives have become a thing of the past as the size of our PCs continue shrink and new form factors have emerged. Microsoft distributes Windows 10 online as ISO images that are typically burned to physical DVD media. This has become problem as a number of laptops and tablet PCs no longer ship with DVD drives. The best way to install Windows on these devices is to use a USB flash drive that contains the Windows installation files. As an extra benefit, modern USB flash drives are typically much faster than DVDs resulting in a quick install.