Windows 10 build 19536

Windows 10 build 19536 is the first Insider Preview build of Manganese. This build was released to Windows Insiders in the Fast Ring on 16 December 2019. From this build onwards, 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 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.
 * You can now browse 2,000 pictures on your Android phone's camera roll using the Your Phone app. They can also be dragged and dropped, as well as being able to save the photos locally to the PC and be shared with other people.
 * The phone screen feature of Your Phone now supports pen input.
 * The Calls feature that was introduced in May 2020 Update build 18999 was rolled out to all 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 the privacy settings.

Bugs

 * You must use an IDE or SATA hard drive if you want to install this build in VMware, otherwise the setup won't be able to find the drive.
 * The BattlEye anti-cheat software has some incompatibility issues due to changes in the operating system between some Insider Preview builds and certain versions.
 * At the time of release, the update process had a chance of hanging for extended periods of time when attempting to install this build.
 * When certain external USB 3.0 drives are attached, they stop responding with Start Code 10.
 * The Optimize drive applet 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.