Installing Windows 10 Feature Updates on an Full Disk Encrypted (FDE) system
This article has been updated to reflect the latest Feature Update known as The Creators Update
This article should be being used in the following context:
Upgrading from Windows 7, 8, 8.1 to a Windows 10 Feature update
Upgrading from an earlier version of Windows 10 (such as 1511 or 1607) to a newer Windows 10 Feature update
When installing a Windows 10 Feature Update, the process fails saying it "Can't install updates".
When the Windows Update and Security Settings panel is displayed it details that "We found some issues. Select this message to fix and finish updating".
If the Fix issues button is clicked, Windows Update loads and explains it "Couldn't install Windows 10 - DESlock+ Disable encryption to continue or run Windows Setup with the /reflectdrivers command-line option".
Due to the way major upgrades of Windows 10 are performed, the update process runs in the same manner as if doing an in place upgrade from an older version of Windows to Windows 10. On a system that has Full Disk Encryption (FDE) in place the upgrade is prevented from accessing the disk as it does not come with the required drivers. The Windows 10 updater realises this, resulting in the warning dialog being seen.
In order to install the Windows 10 Feature Update on your machine while FDE, you will need to download and run the Microsoft Media Creation Tool. This will create the latest Windows 10 ISO for you to use. Then you will need to download and run the DESlock+ Windows 10 upgrade utility. The utility can be used to upgrade your machine from Windows 7, 8, 8.1 or from an earlier version of Windows 10.
Step 1. Create the Windows 10 Media ISO
You can perform this step on any Windows PC.
Note: It is important that the correct version of Windows and language is picked to match your existing system.
Step 2. Installing the Windows 10 Feature Update
On the PC you are updating:
If Single Sign-On (SSO) has been enabled, you must also follow the article below:
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