Windows Update error 0x80240016
If you see Windows Update error 0x80240016 or 80240016 while trying to install updates, it typically means that another installation is in progress. Wait until the installation is finished, and then try installing updates again. If you still see this problem, try using the Windows Update troubleshooter.
To run the Windows Update troubleshooter
Open the Windows Update troubleshooter by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering Troubleshooting in the search box, tapping or clicking Settings, and then tapping or clicking Troubleshooting. Under System and Security, tap or click Fix problems with Windows Update.
Run the troubleshooter, then open Windows Update and try to install the update again.
If you continue to see this error, you might be able to find more help from other people who use Windows at the Microsoft Community
Error 80240016 indicates that Windows Update can't access the user token. The user token contains the basic credentials that enable Windows Update to make changes to your computer on your behalf without requiring you to sign in every time. This error can occur if you're running your computer for long periods without restarting and the token expires. It might also occur when Automatic Update is running in the background and Windows Update is run in the foreground. Starting and stopping the Automatic Update service will reset the service and acquire the token again. This is one of the things that the Windows Update troubleshooter does to try to address problems.
Error codes this applies to: