Windows 10 Insider Preview Build 18855

General changes, improvements, and fixes for PC

• Notepad now automatically restores unsaved content when Windows restarts for updates.
• We’ve enabled microphone in Windows Sandbox, which among other things will improve several accessibility scenarios.
• We’ve added functionality to configure the audio input device via the Windows Sandbox config file.
• We’ve fixed an issue in which the Windows Sandbox time zone was not synchronized with the host.
• We’ve enabled the Shift + Alt + PrintScreen key sequence in Windows Sandbox which activates the ease of access dialog for enabling high contrast mode.
• We’ve enabled the ctrl + alt + break key sequence in Windows Sandbox which allows entering/exiting fullscreen mode.
• We fixed a recent issue resulting in some Insiders experiencing bug checks upon lid close, monitor plug, or monitor unplug.
• We fixed an issue resulting in preferred region settings getting reset on upgrade in the last few flights.
• We fixed an issue resulting in the Chinese version of multiple games not working.
• We fixed an issue in memcpy that caused some drivers to hard-hang the system on load; this could manifest as a hang on upgrade, depending on the system.
• We fixed an issue from recent builds that could result in monitors being missing from the built-in Color Management application.
• We fixed an issue causing Explorer.exe to crash for some Insiders when Jump list content was updated.
• We fixed an issue where text scaling values did not persist across upgrades for Win32 applications.
• Due to a Narrator reading reliability issue for the “Change how capitalized text is read” feature, the feature has been disabled starting in build 18855.
• We fixed an issue that could cause the touch keyboard to crash when switching from IME-based languages to another language.

Known issues

• Launching games that use anti-cheat software may trigger a bugcheck (GSOD).
• While this flight contains some night light improvements, we’re continuing to investigate reported issues in this space.
• When performing Reset this PC and selecting Keep my files on a device that has Reserved Storage enabled, the user will need to initiate an extra reboot to ensure Reserved Storage is working again properly.
• Some Realtek SD card readers are not functioning properly. We are investigating the issue.
• Creative X-Fi sound cards are not functioning properly. We are partnering with Creative to resolve this issue.
• We’re investigating an issue preventing VMware from being able to install or update Windows Insider Preview builds. Hyper-V is a viable alternative if available to you.