I am trying to install Hyper-V on a window Server 2016, but it is failing with an error "The referenced assembly could not be found. Error: 0x80073701"

Looking in the CBS log, I find the following error:

CSI 00000009 (F) STATUS_SXS_ASSEMBLY_MISSING #137412# from CCSDirectTransaction::OperateEnding at index 0 of 1 operations, disposition 2[gle=0xd015000c]

CSI 0000000a (F) HRESULT_FROM_WIN32(ERROR_SXS_ASSEMBLY_MISSING) #137260# from Windows::ServicingAPI::CCSITransaction::ICSITransaction_PinDeployment(Flags = 0, a = f6094af0714877f03ea48f7a77328677, version 10.0.14393.1613, arch amd64, nonSxS, pkt {l:8 b:31bf3856ad364e35}, cb = (null), s = (null), rid = 'Package_1541_for_KB4038782~31bf3856ad364e35~amd64~~', rah = '2', manpath = (null), catpath = (null), ed = 0, disp = 0)[gle=0x80073701]

CBS Failed to pin deployment while resolving Update: Package_1541_for_KB4038782~31bf3856ad364e35~amd64~~ from file: (null) [HRESULT = 0x80073701 - ERROR_SXS_ASSEMBLY_MISSING]

I've checked for issues with language packs (server 2016 unable to add roles or features after making server a domain controller), and English is the only one installed.

I've also run the following:

  • Dism.exe /Online /Cleanup-Image /CheckHealth
  • Dism.exe /Online /Cleanup-Image /ScanHealth
  • Dism.exe /online /cleanup-image /analyzecomponentstore
  • Dism.exe /Online /Cleanup-Image /restoreHealth
  • sfc.exe /scannow

A few issues where fixed, but nothing that seems related.

I think the issue is with KB4038782, but this appears to be superseded, and I cannot find a copy to download.

Does anyone know what I can do to fix this issue?


It looks like this is a known issue. First of all you should try to install the latest cumulative update for Windows Server 2016 by downloading it manually from Microsoft: https://www.catalog.update.microsoft.com/Search.aspx?q=KB5008601

Then, try again.

If it's still not working, you can try the workaround shown in this support article

When trying to install updates from Windows Update you might receive "Updates Failed, There were problems installing some updates, but we'll try again later" with one of the following errors:




[...] Type or copy and paste the following command into the Command Prompt window: dism /online /cleanup-image /startcomponentcleanup

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