Problem:

When you attempt Full Disk Encryption (FDE) on a client workstation, the following error appears and you are unable to start FDE.

You may also see this error in the events of the Enterprise Server when you attempt a Full Disk Encryption (FDE) on a managed workstation.

Cause:

The System and Boot Partitions are located on separate disks, similar to the image below:

This is possibly due to your workstation containing more than one disk where the operating system was re-installed separately or the disk hasn't been cleaned prior to re-installation, resulting in Windows installing the two components on separate disks.

Solution:

You will need to ensure that the System and Boot Partitions are located on the same disk as shown in the image below:

This may entail making a backup of your data and having to re-install the Operating System with only 1 disk present or after cleaning the disks using diskpart.

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How can I tell if my computer is using UEFI and Secure Boot?

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