When attempting to encrypt a disk with Symantec Drive Encryption 10.3.0 or previous (formerly known as PGP Whole Disk Encryption) the operation fails and you receive the error below.
Symantec Drive Encryption 10.3.2 and above now supports GUID Partition Table (GPT) formatting on Microsoft Windows 7 64-bit systems and Windows 8.0/8.1 64-bit systems, running in UEFI mode.
Systems using UEFI should upgrade to Symantec Drive Encryption 10.3.2 or above to obtain this full support for this new functionality.
Refer to article TECH203071 for more details on UEFI support and Symantec Drive Encryption.
UEFI and BIOS are different types of firmware being used by computers. There are three types of bootstrap configuration on laptops and workstation computers: