Windows 10 build 19555

10.0.19555.1001.rs_prerelease.200127-0900
Build of Manganese
Screenshot
OS familyWindows 10 (NT 10.0)
Version number10.0
Build number19555
Build revision1001
Architecturex86, x64, ARM64
Build labrs_prerelease
Compiled on2020-01-27
Expiration date
Timebomb2020-07-31 (+186 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
Win10-19555winver.png
TCB.png

Windows 10 build 19555 is the fifth Insider Preview build of Manganese, the 20H2 development semester of Windows as a service. It was released to Windows Insiders in the Fast Ring on 30 January 2020 and has general changes, improvements, and bug fixes which are listed in the official release announcement.

Bugs and quirks[edit | edit source]

  • The update process to this build has a chance of hanging for extended periods of time.
  • At the time of this build's release, some Windows Insiders were unable to update to this build and instead got an error with either the error codes 0x8007042b or 0xc1900101.
  • The documents section in the privacy settings has a broken icon, and as such, a rectangle shows in its place.
  • The IME candidate window for the East Asian IMEs (like the Simplified Chinese, Traditional Chinese, and the Japanese IMEs) sometimes does not open. If this bug is encountered, change the focus to another application or text field and back to the area that was being originally worked on. Ending the process TextInputHost.exe via Task Manager can also workaround this bug as well.
  • Certain devices do not go to standby properly on this build and it has to be manually triggered by opening up the Start menu, clicking on the power button and then selecting Sleep.

Gallery[edit | edit source]

External links[edit | edit source]