Some proxy configurations can prevent Software Updater functionality Symptoms
Some proxy configurations can prevent Software Updater functionality.
Diagnosis
If your corporate network is behind a proxy or a firewall that has strict deny rules, Software Updater may be unable to download patches from some sites.
Solution
Make sure that your proxy allows hosts to access
download.microsoft.com
and the download sites of other vendors (web or ftp), whose products are installed in your corporate environment.