https://wccftech.com/windows-10-cumulative-update-for-october-2020/

Microsoft has released this month's security updates for several supported versions of its desktop operating system, including the upcoming Windows 10 October 2020 Update. Today's Windows 10 cumulative update is available for Windows 10 May 2020 Update (version 2004), Windows 10 November 2019 Update (version 1909), and May 2019 Update (version 1903), along with the older versions of the OS.

Today's Patch Tuesday updates bring a number of improvements and bug fixes to Windows 10. Microsoft had released a preview of these updates last month, giving it some time to test these Windows 10 cumulative updates. But Patch Tuesday Windows 10 cumulative update also adds security fixes to the mix, making these mandatory, non-optional updates.