Microsoft has released Windows 10 Insider Preview Build 18351 for Insiders in the Fast ring. Microsoft continues to have issues with game anti-cheat software. Running games that utilize this type of software could cause Windows 10 to crash with a Green Screen of Death (GSOD) Microsoft recommends Hyper-V as a substitute and VirtualBox is working for BleepingComptuer as well. As the 19H1 builds move closer to being released, we should expect to see only bug fixes and no major features being added to this development branch.
Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-releases-windows-10-build-18351-19h1-with-only-bug-fixes/