Microsoft released the KB4559004 non-security preview cumulative update with a fixes for File Explorer and an issue that caused Windows 10 computers with wireless wide area network (WWAN) LTE modems to lose Internet connectivity after installing the May KB4556799 update.

The Windows 10 1903/1909 KB4556799 cumulative update was released on May 12th and it led to some Windows 10 devices using WWAN LTE modems not being able to connect to the Internet although the Network Connectivity Status Indicator (NCSI) showed an “Internet access” status.

Microsoft acknowledged this issue on May 22 saying that it affected both client (Windows 10, version