Microsoft announced Windows 8.1 preview download for developer. Microsoft kept up coming Windows 8.1 OS secret, although there are many leaked screens out there in net. Finally Today Microsoft is providing download link for Windows 8.1 Preview OS in ISO file format. 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...