This article details the System Requirements for PGP Desktop 9.9 for Windows.
|Note: The above operating systems are supported only when all of the latest hot fixes and security patches from Microsoft have been applied.
PGP Whole Disk Encryption (WDE)
PGP Whole Disk Encryption (WDE) is supported on client versions of Windows 2000 (Service Pack 4) and Windows XP (Service Pack 1 or 2), and on Windows Vista Service Pack 1.
PGP Whole Disk Encryption is not supported on Windows 2000 Server or 2003 Server.