Microsoft recently released yet another optional update KB5000842 for Windows 10 version 2004 and 20H2. The update brings few new features and several improvements.
Now the update KB5000842 is failing to install for many users. The issue is widespread as is clear from many threads created in official Microsoft forum by users.
One user writes,
Update Error in Windows 10 21H1 ( OS Build : 19043.899 )
Unable to update windows [KB5000842]
Similar issue reported by another user.
0x800f081f error when updating Windows 10
If you want you can try to download and install it manually. You can click on the download link provided below to install it.
You can manually download this update by clicking here. If you need help in understanding how to install these updates manually on your PC, you can refer to our step by step noob-friendly tutorial here.