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And I'd expect you need to activate the TPM on the new computer,
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If the TPM is already activated, before putting the drive in the computer, should I clear the TPM to retake ownership?
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I think so. If there are any old keys stored in the TPM its better to clear them.
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firstly, why are you using USB to boot if you have TPM? You might as well not have the TPM.<br />
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Secondly, moving a disk is easy if you have the recovery key. Put the disk in the new machine (which has bitlocker enabled) and you will be asked for the key before being able to access it.<br />
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I'd recommend removing the bitlocker protection from the drive before moving where practical, but it's not always possible.
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Just for the record: NO, the tpm chip on the new machine is not involved at all <i>if</i> you only try to connect the drive to another machine with a running windows installation. But if you plan to use that drive in its encrypted form as a boot drive on a different machine, yes, then you'd need to remove the old TPM protector and add the TPM of the new machine as protector.
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I am planning to deploy BitLocker in my environment. All of my devices have TPM v1.2 or later, and I am requiring the use of a flash key to boot. If I need to move an encrypted drive to another computer, what are the steps to successfully do this. Are there any steps needed to reconfigure the TPM on the new device?
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I am planning to deploy BitLocker in my environment. All of my devices have TPM v1.2 or later, and I am requiring the use of a flash key to boot. If I need to move an encrypted drive to another computer, what are the steps to successfully do this. Are there any steps needed to reconfigure the TPM on the new device?

BitLocker Encrypted Drive

Encryption is the process of encoding messages or information in such a way that only authorized parties can read it. In an encryption scheme, the intended communication information or message, referred to as plaintext, is encrypted using an encryption algorithm, generating ciphertext that can only be read if decrypted. For technical reasons, an encryption scheme usually uses a pseudo-random encryption key generated by an algorithm. An authorized recipient can easily decrypt the message with the key provided by the originator to recipients, but not to unauthorized interceptors.

Encryption

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.

Windows 7

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.