Microsoft is investigating a problem that affected many users during the installation of the KB4512508 cumulative update for Windows 10 1903.
People whose systems are affected by the problem complain that updates are not installed, and they see the error 0x80073701. The problem concerns both Windows 10 and Windows Server 1903.
At this time, the cause of the problem is unknown, and Microsoft is investigating to determine what it can do to solve the problem.
The installation of updates may fail and you receive the error message “Updates Failed, There were problems installing some updates, but we’ll try again later” or “Error 0x80073701” in the Windows Update dialog or in the update history.