The optional update of Windows 10 KB4598291 is released for devices running Windows 20 versions 2H2004 and 10.
This update comes with many bug fixes.
KB4598291 is an optional update (aka cumulative information “preview”) which means it won’t be applied to your system unless you click “Download and install” in the Settings app.
Unlike Patch Tuesday updates, this optional update comes with fixes for long-standing critical bugs.
To see the optional cumulative updates follow the path Settings - Update and Security - Windows Update - View optional updates.
2021-01 Cumulative Update Preview for Windows 10 Version 20H2 for x64-based Systems (KB4598291)
You can also download the update from Microsoft Update Catalog, το οποίο είναι ένα δωρεάν tool that can help you update your computers.
Windows 10 KB4598291 Direct Links: 64-bit and 32-bit (x86).