Now Windows 10 just preview version is available for download. In addition to updated the preview version, ISO file can also be downloaded.
According to Microsoft announcement, Microsoft Windows version of Windows 10 is now available for download. This version will be downloaded with Windows insiders. Further it can be accessed by clicking the button of PC settings, Update and Recovery, Preview builds and Check Now.
For Virtual machine and Clean installation. ISO file can be download,
To Download Click Here