https://wccftech.com/windows-10-redstone-5-17672/ >Windows 10 April 2018 Update – aka version 1803 – is still causing issues for some users and machines. But the exciting world of Windows Insider community has already moved on to more fun builds. Windows 10 Insider Preview Build 17672 from the Redstone 5 branch has been released to Windows Insiders in the Fast ring and those who had signed up for Skip Ahead. >Build 17672 doesn’t actually bring any massive new features and focuses on bug fixing and Windows security improvements. Here is the complete changelog.