1. Checked that there is downloading pending issue in the environment
2. Check there is WSUS in the environment
Registry: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
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
The KB4579976 update file is named as KB4578973 and KB4578966, we downloaded both of them.
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.
