1. Checked that there is downloading pending issue in the environment
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2. Check there is WSUS in the environment
Registry: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
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3. We first try to manually download update from Microsoft Update Catalog and then use commands to install it:
1) We choose the KB4579976
2) Download it from the Microsoft Update Catalog: https://www.catalog.update.microsoft.com/Search.aspx?q=KB4579976
3) Click on download and then download the below .msu file
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The KB4579976 update file is named as KB4578973 and KB4578966, we downloaded both of them.
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4. Then we use dism commands to install the KB4578966
1) Create folder C:\temp\cab
2) Download the update KB4578966 from http://catalog.update.microsoft.com to C:\temp
3) Expand the .msu file to extract the .cab file by running below command in CMD:
expand -F:* C:\temp\{.msu file name with extension} C:\temp\cab
4) You will get a .cab file from last step. Use the following DISM command to add package:
Dism /online /add-package /packagepath:c:\temp\cab\{.cab file with extension}
5. Then we can get the successful result that the manual installation of update is available on the problem machine.
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