Windows 10 build 17120 is now in the Fast ring – here’s what’s new March 14, 2018 by admin Tweet Microsoft released yet another Windows 10 for PCs Insider Preview to the Fast ring, bringing the build number to 17120. It contains new features for Windows Defender Application Guard. Read more… Neowin Related Posts:Windows 11 Insider Preview Build 22621.575 and Build…Windows 11 Insider Canary preview build 25905 adds…Windows 11 Insider Release Preview build 22621.1926…Windows 11 Insider Dev Channel preview build 23595…Windows 11 Insider Dev Channel preview build 23486…