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With the recent launch of the Windows 10 Fall Creators Update, Microsoft is now focused on the development of the next version of Windows 10, codenamed Redstone 4.
A week after pushing out the first Redstone 4 build to the Slow ring (http://www.windows10newsinfo.com/smf/index.php/topic,33922.0.html), and about two weeks since the launch of the latest Fast ring Redstone 4 build (http://www.windows10newsinfo.com/smf/index.php/topic,33888.0.html), the company is now making available the files for Windows 10 build 17025 (via Neowin (http://www.neowin.net/news/the-first-windows-10-redstone-4-isos-are-now-available)).
As usual, Windows Insiders can find these ISO files by heading to the Windows Insider Preview downloads web page (http://www.microsoft.com/en-us/software-download/windowsinsiderpreviewadvanced?ranMID=24542&ranEAID=TnL5HPStwNw&ranSiteID=TnL5HPStwNw-7QfDoy6xQsuogIqRn0fIJA&tduid=(991052fa06079fb574bf18db2082307f)(256380)(2459594)(TnL5HPStwNw-7QfDoy6xQsuogIqRn0fIJA)()) and signing in with a Microsoft account. There are three sets of images that can be downloaded: Windows 10 Insider Preview, Windows 10 Insider Preview Enterprise, and Windows 10 Insider Preview Home China. The following supplementary downloads are also available:
► Symbols MSI Insider Preview – Build 17025 32-bit / 64-bit
► Features on Demand Pack Insider Preview (part 1) – Build 17025 32-bit / 64-bit
► Features on Demand Pack Insider Preview (part 2) – Build 17025 32-bit / 64-bit
► Language Pack Bundle Insider Preview – Build 17025
► Inbox Apps Bundle Insider Preview – Build 17025
If you want to download the new ISOs, you can find them here (http://www.microsoft.com/en-us/software-download/windowsinsiderpreviewadvanced).
source (http://www.onmsft.com/news/first-batch-of-windows-10-redstone-4-iso-files-now-available)