As part of the February Patch cycle, Microsoft is rolling out a new cumulative update for all supported versions of Windows.

The cumulative update with security fixes is rolling out to PCs with October 2020 Update, May 2020 Update, November 2019 Update, and May 2019 Update. In this month's update, there are only security enhancements for the system, browsers, core components and other basic functions.

The cumulative update for Windows 10, version 2004 and 20H2 is KB 4601319 and it is expected to include security bug fixes. At the moment, the changelog is not available due to unknown issues with Microsoft support document.

For those on version 1909, a new cumulative update with package number (KB4601315) is now available and it comes with security fixes. The changelog for this update is also not available.

How old is old ?
If I switch my old desktop on although it’s now running Windows 10 as and when I feel like using it instead of my iPads will I see a message ?

As I speak Downloading was taking place
2021-02 Cumulative Update for NET framework 3.5 and 4.8 for Windows 10 version 2004 for x64 ( KB 4601050)
Status:Pending install

2021-02 Cumulative Update for Windows10 Version 2004 for x64 -based Systems ( KB 4601319)
Status: Downloading -97%