Windows 8.1 Preview ISO files

Windows 8.1 Preview ISO files (.iso) are provided as an alternative to downloading Windows 8.1 Preview through Windows Store. You should only use the ISO files if you are an advanced user and want to install the preview on another partition, another PC, or a virtual machine. Otherwise, I strongly recommend that you download Windows 8.1 Preview from Windows Store.

How to install Windows 8.1 Preview from an ISO file

To install Windows 8.1 Preview from an ISO file, you must first convert the ISO file into installation media stored on a DVD or a USB flash drive.

If you're using Windows 8, follow these steps to install Windows 8.1 Preview from an ISO file:

• Download the ISO (.iso) file.
• Double-tap or double-click the ISO file.
• Double-tap or double-click setup.exe and follow the steps.

If you're using Windows 7, the easiest way to convert an ISO file to a DVD is to use Windows Disc Image Burner. On a PC running Windows XP or Windows Vista, a third-party program is required to convert an ISO file into installable media—and DVD burning software often includes this capability.

For ISO file go to the link below..

Download Windows 8.1 Preview ISO