Ran into a problem today when trying to install Windows 10 Feature Updates on an Full Disk Encrypted (FDE) system.  The machine had DESlock+ installed onto it and was refusing to install the latest Build.

I used the following article to get round it:
https://support.deslock.com/index.php?/Default/Knowledgebase/Article/View/379

You need to Download the Media Creation tool, save an ISO and then install the DESlock+Win10Update utility:
https://support.deslock.com/resources/KB379/DESlock+Win10Updater.exe

When the Utility Runs, you need to point it at the mounted Win10 ISO.  It will then complete.
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