Security News > 2021 > February > Windows 10 KB4598291 update fixes device deactivation, responsiveness issues
Microsoft has released the KB4598291 release preview cumulative update for all editions of Windows 10 and Windows Server versions 2004 and 20H2, with fixes for device deactivation issues and unresponsiveness while playing games in full-screen.
After installing the KB4598291 non-security update you may experience issues with system and user certificates getting lost when updating from Windows 10 1809 or later versions utilizing outdated update media.
With the KB4598291 monthly "C" release preview update, Microsoft addresses an issue that would incorrectly deactivate some Windows 10 Education devices following an upgrade to Windows 10, version 2004.
Microsoft recommends installing the latest servicing stack update installed before this cumulative update is deployed to minimize issues with this update.
Addresses an issue that incorrectly deactivates some Windows 10 Education devices after upgrading to Windows 10, version 2004.
Addresses an issue that causes a device to stop working when deploying Microsoft Endpoint Configuration Manager if AppLocker is enabled on the device.
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