[KB8027] Error "This copy of windows is not installed on the Primary Boot drive" displayed when starting Full Disk Encryption

Issue

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

• You see the following error in the Event Details of the ESET Endpoint Encryption Server when you attempt a Full Disk Encryption (FDE) on a managed workstation

Details

The System Partition and Boot Partition are located on separate disks. Your workstation may contain more than one disk where the operating system was re-installed separately or the disk has not been cleaned before re-installation, resulting in Windows installing the two components on separate disks. 

Solution

Ensure that the System Partition and Boot Partition are located on the same disk.

1. Make a backup of your data.
   
   
2. Re-install the Operating System with 1 disk present or clean the disks using Diskpart.