Windows 7 - 0x80240016 WU_E_INSTALL_NOT_ALLOWED Operation tried to install while another installation was in progress or the system was pending a mandatory restart.

This article lists the error codes for Microsoft Windows Update. You can use these error codes to verify information from the Windows Update log file. The log file is typically located in the following folder:

%systemroot%\windowsupdate.log

Error codes that the Component Based Servicing (CBS) interface methods return

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