http://msdn.microsoft.com/en-us/windows/apps/br229516All three come as ISO files - images of the contents of a CD or DVD.
Since each of the packages is several gigabytes in size, must use a DVD if you want to burn the files on a disk. With Windows 7, you can burn the ISO file to DVD by double-clicking on the Windows Disc Image Burner box. For older operating systems, you can use a tool like ISO Recorder to burn the file. Alternatively you can use tools such as Virtual CloneDrive or Daemon Tools to "mount" the ISO file as a drive, eliminating the need to burn to a disc. As this is a prebeta version, you want the OS to install on a spare PC or a virtual environment, so it does not interfere with your work or production machine. Those of you who want to know what you're getting into before you attempt to install the Developer Preview, you can check an early hands-on look at Windows 8 of CNET's Seth Rosenblatt. What's next after the Developer Preview? Speaking at the Build-conference yesterday, Steven Sinofsky, senior vice president of Microsoft's Windows division, confirmed earlier reports that Windows 8 will next move into a beta version, followed by a Release Candidate. Assuming all goes well, we can expect that the final RTM (release to manufacturing) issue some time after that. Sinofsky did not identify a specific timetable for the beta or Release Candidate.However, the company expects the beta at the 2012 Consumer Electronics Show in January to launch, according to WinRumors. Description: Download Windows 8 Developer Preview For Free Rating: 4.5 Reviewer: ls ItemReviewed: Download Windows 8 Developer Preview For Free