When attempting to perform PGP Whole Disk Encryption, you receive the error Cannot commit to disk.
This error can occur when attempting to encrypt a disk with PGP Desktop 9.8.3 on Windows XP SP3. Windows XP Service Pack 3 is supported on versions of PGP Desktop 9.9.x and above. To use PGP Desktop on a system with Windows Service Pack 3, you must upgrade PGP Desktop.
To upgrade PGP Desktop: