"On computers without a compatible TPM, BitLocker can provide encryption, but not the added security of locking keys with the TPM. In this case, the user is req

"On computers without a compatible TPM, BitLocker can provide encryption, but not the added security of locking keys with the TPM. In this case, the user is required to create a startup key that is stored on a USB flash drive." http://windows.microsoft.com/en-US/windows-vista/BitLocker-Drive-Encryption-Overview http://windows.microsoft.com/en-US/windows-vista/BitLocker-D...