KB4568831 not installing

Okay. Well based on the comments I don't think I'll bother yet. I don't understand why Microsoft would change the version number format from 2009 to 20H2 for the public release. I get why the insider preview is 20H2 but not the public release as others are reporting.

I have to say the optional update was well hidden and if not for this forum, which most users will not visit the optional update will go un-noticed for quite some time.

I think what was throwing me was the change in version format and the fact the catalog showed preview, which the optional update also does.

This KB is same for v2004 and 20H2.

It bring v2004 to build 19041.423 is released to public at 31st of July as on Optional Updates.

Check for updates, click View optional updates and click ">" to see it.

See Windows Update History for v2004.

https://support.microsoft.com/en-us/help/4568831

It's also available in Windows Update Catalog.

https://www.catalog.update.microsoft.com/Search.aspx?q=KB4568831

Quote from release announcement:

Hello Windows Insiders, today we’re releasing 20H2 Build 19042.423 (KB4568831) to Windows Insiders in the Beta Channel. This release is a re-release of 20H2 19042.421 from last week but brings it to parity with the Windows 10 May 2020 (20H1) servicing as of today.

https://blogs.windows.com/windowsexperience/2020/07/31/announcing-windows-10-insider-preview-build-19042-423-20h2/

The KB number is listed as a preview so perhaps it shouldn't have been released to the public builds. The version for a public build should be 2004 and not 20H2.

If that is the case there's nothing we can do until Microsoft sort the server end.

I received KB4568831 on my insider build but not on my public build. It states the update is for 20H2 and not 2004. I realise it will be released after the Enablement package and should be listed in Program and Features (via uninstall an update) that can be uninstalled if necessary.

My public release is version 2004 build 19041.388 and the Insider version 20H2 build 19042.423.

Actually it's NOT an insider update. It was originally but on July 31st it was rolled out to everyone. It still has the same  problem though!

I had exactly the same problem, tried every possible solution that has been suggested, northing appeared to work. I have two desktop PCs and a laptop. The laptop installed the update without any problem as did one of the desktop PCs, leaving one PC that just would not install the update.

However......it appears that at least part of the update DID install as when I compare the 'Start' and 'Action Centre' screens on the three computers they are now all the new start and Action Centre design!

There is no trace of the update in the update history apart from an entry that says 'install failed', but it certainly seems as though some part of the update has installed.