I downloaded all the available stuff for a Vista test machine and it installed BitLocker in addition to all the available language packs. I thought I'd try BitLocker, not expecting it to install at all since the machine is old and I'd heard it requires a TPM module. Well, it did its thing with the partitions, creating a 1.46GB new boot S: drive real quickly and rebooted. THEN it tells me I need TPM. Who thunk that one up?