After publishing new cumulative updates for Windows 10 20H2, Microsoft has now started rolling out a patch for older versions of the OS. As always, you can download Windows 10 KB5000808 offline installers to apply the update to multiple machines without an active internet connection.
Windows 10 KB5000808 is being released as part of the Patch Tuesday release cycle and it comes with general security improvements, but you can also get non-security fixes if you haven’t installed February optional update.
Remember that this particular update is only for Windows 10 version 1909. If you’re on version 20H2 or version 2004, Microsoft says your device will get a different patch with Build 19042.867 and additional important bug fixes. To know more about the version 20H2 patch, visit the linked article.
On Windows 10 version 1909, you will see the following update instead:
2021-03 Cumulative Update for Windows 10 Version 1909 for x64-based Systems (KB5000808)
After applying the aforementioned update, Windows 10 version ‘November 2019 Update’ will bump to Build 18363.1440.
Download Links for Windows 10 KB5000808
Windows 10 KB5000808 Direct Download Links: 64-bit and 32-bit (x86).
Windows 10 KB5000808 (Build 18363.1440) Full Changelog
The focus of Windows 10 Build 18363.1440 is apparently on security fixes, but it also comes with quality fixes.
For instance, Microsoft says it has resolved front issues affecting some Windows apps and settings.
This cumulative update fixes an issue with SetWindowRgn API, which is responsible for defining the screen region’s coordinates. After a botched update, the API started using incorrect values for the app windows. As a result, some users were unable to maximize, minimize, or close a window.
Like every other cumulative update, March 2021 patch for version 1909 also comes with a BSOD fix.
Last but not the least, Microsoft has also resolved an issue that causes a spike in bandwidth usage when Windows 10 is checking for updates. The tech giant believes that the issue affected only a small subset of users and those with special authenticated user proxy as the fallback method.
Known issues in the update
According to the changelog, Microsoft is still investigating reports of a rare issue where user certifications for enterprise apps will disappear when you update your device. This problem is also experienced when users run outdated Media Creation Tools or media images that do not have the hotfix.
If you manage your Windows Updates manually, Microsoft recommends you to install the latest servicing stack update (SSU) before installing the latest cumulative update (LCU).
Generally, he SSUs will install automatically if you use Windows Update via Settings. However, in some rare cases, you may need to download and install the SSU manually. This is required only when an update fails to install.