Error install Cumulative Update for .NET on Server 24H2 (0x80070bc9)

Hi robajz,

I'd focus on this entry in the CBS log:

System Protection / luainstall.dll / 0x80070003

Right after that, CBS reports 0x800F0922 and rolls back the update.

The first error points to a missing path, but the screenshot doesn't show which one. That's what I'd investigate next, rather than running DISM or clearing the update cache again.

Can you post around 30–50 lines from CBS.log immediately before the failure at 07:32:02? Preferably as text, with any sensitive information removed.

I wouldn't touch the servicing registry or pending files until we know exactly what's failing.

On other thing worth checking is the Windows Modules Installer service configuration:

sc.exe qc TrustedInstaller

I'm not suggesting the service is necessarily the problem, but it would help rule out an unusual startup configuration.