Build list
Build 9697
Developer Build. Displayed at Microsoft’s 2013 Fall Conference.
Build 9730
the file version of UNLEAK2051.DLL in build 9733 has the file version 9.0.9730.1, proving this build exists.
Build 9733
Leaked in December 2017 by Hacker organization “LeakAll”.
Build 9735
1st Developer Preview (released January 17, 2014).
Internet Explorer
Internet Explorer is update to 11.5.
Build 9740
Fast ring Developer Preview (released February 2, 2014).
Unknown Late February Build
This build was showcased on a website that has images of Windows Beta builds, but the build number was not shown, so no one can confirm if this build is real. Some say the build number was 9740.1000
Build 9741
Consumer Preview (released March 30, 2014).
Build 9750(Pre-RTM)
Simplified Chinese Pre-RTM (released April 29, 2014).
Build 9750(RTM)
RTM.
Build 9751 (Service Pack 1)
Service Pack 1 build of Windows 9. (released October 20, 2014).
Build 9751 (Post-RTM)
Japanese Post-RTM Build of Windows 9 (released May 8, 2014).
Build 9788
Leaked in September 2020 by hackers.
Build 9791
1st Technical Preview build (released October 15, 2014).
Build 9792
Technical Preview build (released October 29, 2014).
Project Spartan
Microsoft Edge (Codename Project Spartan) is joining this build, based on Internet Explorer 11.5.
Build 9795
Insider Preview build (released December 12, 2014).
Build 9797
Minor bugfix build, removal of LockKill, a minor bug that prevents you from logging in for 30 minutes (released December 20, 2014).
Build 9800
RTM Build (released January 2, 2015.)
Build 9834
This Build (please note this build has been updated and patched and is likely more complete than windows 9 was when Microsoft switched to 10 development).
Build 9975
Major bugfix build, removal of syskey, WannaCry vulnerability patched (released May 14, 2017).
Mid-late 2017 Build
Displayed at Microsoft’s 2017 Fall Conference.
Build 10012
1st Insider Preview Build (Released November 19, 2017.)