https://docs.microsoft.com/en-us/windows/release-health/windows-message-center#1581
2021-03x64 ベース システム用 Windows 10 Version 20H2 の累積更新プログラム (KB5000842)
March 29, 2021—KB5000842 (OS Builds 19041.906 and 19042.906) Preview
Addresses an issue that prevents Windows from activating Windows 10, version 2004 using the OA 3.0 key after installing KB4598291.
Removes the Microsoft Edge Legacy desktop application that is out of support and installs the new Microsoft Edge.
Addresses an issue that prevents Server Message Block 1 (SMB1) clients from accessing the SMB share after restarting the LanmanServer service.
Servicing Stack 10.0.19041.903
