# Windows Update Error 0x80240016 – WU_E_INSTALL_NOT_ALLOWED

In this post, we’ll look at the Wndows Update Error Message “0x80240016 – WU_E_INSTALL_NOT_ALLOWED” that is usually displayed when things go wrong during the update process.

Note that this Windows Update error is application for both Windows 10 and Windows 11.

## Error Message

0x80240016 – WU_E_INSTALL_NOT_ALLOWED

## Windows Update Error Details

Operation tried to install while another installation was in progress or the system was pending a mandatory restart.