Hi Patricia,
There may be a corruption in the folder where Windows Update stores the downloaded files. When this happens, you won't be able to install security updates for your computer. If you are experiencing issues installing or downloading updates, you may refer to this article on how to reset Windows Update components. The article includes steps on how to manually reset the update components and also a guided walk-through to help you resolve Windows Update issues.
Once Windows Update is fixed, we recommend that you check for the latest network adapter driver and install it and check if the issue with your Internet connection persists.
Let us know if you need more help.