Use Vista's BitLocker with a USB Key

Hackszine.com: Use Vista's BitLocker with a USB Key: "Vista's BitLocker drive encryption is available in the Ultimate and Enterprise editions. To use it, you'll need a computer with a supported Trusted Platform Module (TPM), but even if you have one, it may not be enabled properly in your computer (in which case, you'll be waiting on your PC or motherboard vendor to update the BIOS)."