Unable to boot to operating system after encrypted the drive (operating system missing).
Operating System missing or Blinking cursor
This issue could be caused by the laptop having a forced shutdown or power off during encryption of the disk. PGP Whole Disk Encryption instruments the disk with PGP MBR which may not be accessible after a forced shutdown.
The best option to get the drive decrypted is by slaving the drive to another computer with PGP Desktop installed.
Slave the drive to another computer.
Open open PGP command line and type following command.
pgpwde --enum to Enumerate system disks.
pgpwde --decrypt --passphrase <passphrase> --disk 1
Once decryption is competed check if operating system is bootable if not use the Windows recovery CD to repair.
Dell Latitude e5510
Windows 7 Professional