Microsoft March 2021 "C" Release Preview Cumulative Update for Windows 10 Versions 1909 and 1809

Microsoft released the monthly “C” release preview cumulative update with non-security improvements and fixes yesterday for Windows 10 Versions 1909 and 1809. 

Both sets of updates have a long list of key changes which can be viewed in the KB articles.  Note, however, if you installed earlier updates, only the new fixes contained in this package will be downloaded and installed on your device.  To download and install the update, go to Settings -> Update and Security -> Windows Update and select Check for updates. Links to the standalone packages are included in the update information below.

Windows Version 1909 (Build 18363.1474), KB5000850:  

If you are using Windows Update, the latest SSU KB5001205 will be offered to you automatically. The SSU update addresses an issue that might prevent the CVE-2020-0689 update from installing. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

Highlights

• Updates an issue with zoom that occurs when using Microsoft Edge IE Mode on devices that use multiple high-DPI monitors. 
• Updates an issue with Japanese input that occurs after focus changes between boxes in Microsoft Edge Legacy. 
• Updates an issue that displays nothing or shows “Computing Filters” indefinitely when you filter File Explorer search results. 

Note:  This update also removes the Microsoft Edge Legacy desktop application that is out of support and installs the new Microsoft Edge. For more information, see New Microsoft Edge to replace Microsoft Edge Legacy with April’s Windows 10 Update Tuesday release.

Windows 10 Version 1809 (Build 17763.1852), KB45000854:  

If you are using Windows Update, the latest SSU (KB5000859) will be offered to you automatically. The standalone package for the update is available in the Microsoft Update Catalog.  To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog.

Highlights

• Updates an issue with zoom that occurs when using Microsoft Edge IE Mode on devices that use multiple high-DPI monitors.
• Updates an issue that displays nothing or shows “Computing Filters” indefinitely when you filter File Explorer search results. 
• Updates an issue with Japanese input that occurs after focus changes between boxes in Microsoft Edge Legacy. 

Known Issue:  After installing KB4493509, devices with some Asian language packs installed may receive the error, "0x800f0982 - PSFX_E_MATCHING_COMPONENT_NOT_FOUND."

For information about the the types of updates released by Microsoft each month see Windows 10 update servicing cadence primer.

Windows 10 update history

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