Get Microsoft official Windows 8.1 ISO and make installation disk

        Although Microsoft only provides Windows 8.1 ISO downloads for MSDN or TechNet users, there are still ways to get Microsoft's official Windows 8.1 ISO and make installation disks.
Go to the official Microsoft page & ldquo;Upgrade Windows using only the product key>:http://windows.microsoft.com/en-us/windows-8/upgrade-product-key-only
Download address Win8 installation program:
http://down.tech.sina.com.cn/content/60084.html

click & ldquo; install Windows 8 & rdquo; button, it will download and install assistant, after the download is complete open.
Enter the product key of your previous purchase of Windows 8 or Windows 8 Professional or Windows 8 Upgrade and download the appropriate version.
When starting the download, click the x in the upper right corner of the window to close the installation assistant.
Reopen the Windows upgrade page (http://windows.microsoft.com/zh-cn/windows-8/upgrade-product-key-only), click “Install Windows 8.1”, then download the new Installation assistant.
Run the latest download installation assistant and download Windows 8.1.
After Windows 8.1 download is complete, select "Install from installation media", it is this option to make a USB or DVD system installation disk.

in the media selection interface, we can see two options, select the first may want to install the files stored in the U disk, select the second is direct access to ISO documents.