Windows 10 build 20152.1000

10.0.20152.1000.rs_prerelease.200617-1502
	Build of Iron
OS family	Windows 10 (NT 10.0)
Version number	10.0
Build number	20152
Build revision	1000
Architecture	x86, x64, ARM64
Build lab	rs_prerelease
Compiled on	2020-06-17
Expiration date
Timebomb	2020-07-31 (+44 days)
SKUs
	Home (N, Single Language, China) ; Pro (N, Single Language, China); Pro Education (N); Pro for Workstations (N) ; Education (N); Enterprise (G, N) ; Enterprise Evaluation (N) ; Enterprise multi-session; IoT Enterprise; Team
Product key
	Use a Windows 10 Retail serial
About dialog

Windows 10 build 20152.1000 is the second Insider Preview build of Iron, the 21H1 development semester of Windows as a service. This build was released to Windows Insiders in the Dev Channel on 24 June 2020.

History[edit | edit source]

Two days prior to the public release of this build, a comment was made by a Microsoft employee on GitHub regarding an issue with the WinUI 2 ScrollBar XAML template when the High Contrast White theme was enabled.^[1]

The details of the issue were:

- The ScrollIndicator template didn't display until the user hovered over it, while on the regular version, the scroll indicator was always visible.
- The ScrollBar template's handle was always white.

Bugs[edit | edit source]

There's a chance that the system may crash with a HYPERVISOR_ERROR BSOD.
The update process to this build has a chance of hanging for extended periods of time.
Notepad may fail to open files which were automatically saved during a PC upgrade (or restart if enabled in Settings). Saved documents can be recovered from %localappdata%\Notepad.
At the time of this build's release, there was a chance of the system crashing with a BSOD during the update process if an Xbox controller was connected to the device, and it would consequently roll back to the previous build as a result. After the rollback, the error code 0xc1900101 would appear on the Windows Update history page. A workaround was to disconnect or unpair the Xbox controller to successfully update to this build.
Some third-party games and applications may crash at launch or fail to install on this build.
Sometimes the screen can randomly become dimmer after upgrading from a previous build.
Task Manager has a chance of showing a CPU speed of 0.00 GHz on the Performance tab. When the Task Manager does not show 0.00 GHz it may also sometimes show abnormally high values.
Reset this PC does not work if launched from the Settings app, giving you the error "There was a problem resetting this PC." To workaround this issue, start the tool from Windows Recovery Environment.