BitLocker protection on removable drives is known as BitLocker To Go. When a BitLocker-protected
removable drive is unlocked on a computer running Windows 7, the drive is automatically recognized
and the user is either prompted for credentials to unlock the drive or the drive is unlocked automatically
if configured to do so. Computers running Windows XP or Windows Vista do not automatically recognize
that the removable drive is BitLocker-protected. With the BitLocker To Go Reader users can unlock the
BitLocker-protected drives by using a password or a recovery password (also known as a recovery key)
and gain read-only access to their data.
Download it here.