Microsoft releases KB4598291 update to fix lots of Windows 10 problems Microsoft has released a new update for Windows 10, addressing various issues that have plagued users. Although the KB4598291 update is an optional one, it fixes so many problems that many people are going to want to get it installed straight away. This particular update is only available for Windows 10 May 2020 Update (version 2004) and Windows 10 October 2020 Update (20H2). See also: Microsoft shared news of the update on Twitter: The January 2021 monthly “C” release preview update for Windows 10, version 20H2 and Windows 10, version 2004 is now available. https://t.co/Kly2Mn4wDz.— Windows Update (@WindowsUpdate) February 2, 2021