Windows 10 build 19536

Windows 10 build 19536 is the first Insider Preview build of Manganese, the 20H2 development semester of Windows as a service. This build was released to Windows Insiders in the Fast Ring on 16 December 2019. From this build onwards, aside from a brief period between Windows 11 build 22000.51 and build 22000.168, Fast Ring builds are no longer tied to a specific release.

New features and changes

 * Microsoft To-Do is now installed by default.
 * The updated Korean IME that was introduced in May 2020 (Vibranium) Update build 18941 and removed in build 18980 was reintroduced, only to be removed again in build 19628.
 * Introduced a new family group setup page in the OOBE, which was only available to some Windows Insiders.
 * Windows Recovery Environment now no longer requires an administrator password to access the recovery tools.
 * You can now remove the previous search queries in File Explorer's search box by right clicking on them.
 * Added a Downloads folder section to Settings → Privacy.

SCSI Disk bug

 * You must use an IDE, SATA or NVMe drive if you want to install this build in VMware, otherwise the setup won't be able to find the drive.

Others

 * The BattlEye anti-cheat software has some incompatibility issues due to changes in the operating system between some Insider Preview builds and certain versions.
 * The update process to this build has a chance of hanging for extended periods of time.
 * When certain external USB 3.0 drives are attached, they stop responding with Start Code 10.
 * Drive Optimizer incorrectly reports that optimization was never run on some devices.
 * The documents section in the privacy settings has a broken icon, and as such, a rectangle shows in its place.