Microsoft have made available Windows 10 20H1 build 19013 as an ISO replacing the last ISO of 18990. The ISO is available for Windows Insiders to test clean installs of Windows 10 20H1 and is available in 32bit and 64bit versions.
Build 19013 is pretty much feature complete with just three known issues:
BattlEye and Microsoft have found incompatibility issues due to changes in the operating system between some Insider Preview builds and certain versions of BattlEye anti-cheat software. To safeguard Insiders who might have these versions installed on their PC, we have applied a compatibility hold on these devices from being offered affected builds of Windows Insider Preview. See this article for details.
We’ve heard that Settings still isn’t available outside of launching via the URI (ms-settings:) for some Insiders and are investigating.
If you use remote desktop connection and the target PC is on this build, within about an hour (if not sooner), DWM may start crashing, and the session window will either go totally black, experience black flashes, or you may get signed out of the remote desktop session altogether. We appreciate your patience.