Article ID : 00013998 / Last Modified : 08/25/2016

I am unable to access the computer after enabling the BitLocker Drive Encryption feature.

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The BitLocker® Drive Encryption feature works with the Trusted Platform Module (TPM) hardware component, but not every computer that has the TPM hardware component can support the BitLocker Drive Encryption feature. The BitLocker feature is only supported on the Ultimate and Enterprise editions of the Windows® 7 operating system.

You will be unable to access the computer if you have enable the BitLocker Drive Encryption feature on a computer that has the TPM hardware component but which has a version of the Windows 7 operating system other than the Ultimate or Enterprise version. The reason for this is because the version of Windows 7 you have does not support the BitLocker feature.

The only way to return the computer to operability is to perform a complete System Recovery.

IMPORTANT: The TPM hardware component is provided on some VAIO® computers even though they have a version of the Windows 7 operating system that does not support the BitLocker feature. The reason for this is to allow customers the ability to use the BitLocker feature if they upgrade to either the Ultimate or Enterprise version of the Windows 7 operating system at a future date.

For more information about the BitLocker Drive Encryption feature in the Windows 7 operating system, visit the Windows 7 features website.