> UPEK stores Windows account passwords in the registry OK, let's say that's true. If you're also using Bitlocker ( http://en.wikipedia.org/wiki/BitLocker_Driv

> UPEK stores Windows account passwords in the registry OK, let's say that's true. If you're also using Bitlocker ( http://en.wikipedia.org/wiki/BitLocker_Drive_Encryption http://en.wikipedia.org/wiki/BitLocker_Drive_Encryption ), which you should be if you're that concerned about somebody breaching your system ... Then the only way somebody could access the registry is if they had malware installed on your computer or had an account on your system with administrator privileges. If either is true, you're already screwed anyway. I would be more concerned with the fact that fingerprint readers are really easy to foil without any wacky software doing funny things.