When installing patches and hotfixes silently (wusa.exe <some_patch_or_hotfix.msu /quiet /norestart) it is advisable to check the Setup eventlog.
It is possible that you find some error there:
Windows update could not be installed because of error 2149842967
Actually what Windows is saying:
The update is not applicable to your computer.
Well oke that could also be in normal English 😉