In that situation, you can easily delete the already downloaded updates which will for Windows Update to run again and check for and download the updates again.
There will be times when the updates become corrupted or for other reasons, you just don’t want to install the downloaded updates. If you want to force Windows Update to re-download all the updates again, you can do this using the steps below.
Check for updates How to force Windows Update to download already downloaded updates
But if you are using Windows 10 or Windows Server 2016, you can use UsoClient command which has more options than wuauclt.
The above-mentioned command will work in all versions of Windows, including Windows 7 and Windows Server 2008 R2. Since the command prompt does not show any progress, a better approach would be to check and install updates at the same time.