This document shows how to perform whole-disk encryption and decryption in Windows.
From the Select disk or partition to encrypt list, select the computer hard drive you wish to encrypt.
WARNING: do not select any peripherals that might be listed, such as iPods or digital cameras.
Removable media, such as an external hard drive or flash drive, may be encrypted, but PGP must be installed on any computer that you wish to use with the removable media so that you can decrypt the data on it.
Make sure that Power Failure Safety is check marked.
The encryption process will begin.