0x80073701 error while installing IIS features on Windows Server 2016

Hiroaki Sugihara 21 Reputation points
2022-06-23T10:35:09.337+00:00

Hi Guys,
I would like to hear any kind of your advice to fix the below issue...

Issue
Windows Server 2016 cannot install IIS features on Server Manager - Add Rolls and Features

Error
0x80073701
The Referenced assembly could not be found

Actions attempted but no lucks

  1. "Specify alternate path"
    Tried to install from the DVD install media; E:\sources\sxs
  2. Run from elevated CMD: "DISM /Online /Cleanup-Image /RestoreHealth /Source:E:\sources"

Others
microsoft-windows-netfx3-ondemand-package.cab was in the DVD media

Please kindly advise me if I can try something else other than re-installing the OS from scratch.

Regards,

Windows development Internet Information Services
Windows for business Windows Server User experience Other
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Accepted answer
  1. Anonymous
    2022-06-23T14:46:52.13+00:00

    0x80073701 = ERROR_SXS_ASSEMBLY_MISSING which means there are some system files are missing, which caused the update installation failure. You can also try a repair install by running setup.exe from the root of the install.

    I wouldn't hold much hope for this, time may be better spent standing up a new one, patch it fully and migrate the roles or applications over to it.

    --please don't forget to upvote and Accept as answer if the reply is helpful--

    1 person found this answer helpful.

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  1. Bruce Zhang-MSFT 3,771 Reputation points
    2022-06-24T01:50:36+00:00

    Hi @Hiroaki Sugihara ,

    Please try these ways to fix the issue.

    • Open command prompt and run as administrator. Enter command sfc /scannow and wait for scan finish. Then check if the issue has been solved.
    • Open command prompt and run as administrator. Enter command DISM /Online /Cleanup-Image /RestoreHealth. Then restart computer to take effect and check if the issue has been solved.
    • Check CBS.log and remove the patches. Open CBS.log and search the error_sxs_assembly_missing and check if there is any KB update related with it. Then reinstall it and run windows update again.

    If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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    Best regards,
    Bruce Zhang

    1 person found this answer helpful.

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