Windows Mobile 6.5, Windows RT and core edition of Windows 8.1 include device encryption, a feature-limited version of BitLocker that encrypts the whole system.
The"Transparent operation mode" and"User authentication mode" of BitLocker use TPM hardware to detect if there are unauthorized changes to the pre-boot environment, including the BIOS and MBR.
To use BitLocker without TPM, you must change the default behavior of BitLocker Installation Wizard by using Group Policy or configure BitLocker by using script.
This new release includes several new features that enhance Windows Server 2008 R2's security and configuration, such as DirectAccess, BranchCache, BitLocker improvements, among others.
Vista does provide this functionality, but only the Windows Vista Enterprise(commercial Advanced Edition) and Ultimate(Ultimate) provide system level security protection for BitLocker.
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