I have just been asked by my Regulator to confirm that "all hard diskson pc's and laptops" are encrypted. At the moment I can see how to use windows Xp to encrypt folders. Then if I try to open those folders on another machine they won't open. But can not see how to encrypt whole drives with Xp. Is this possible ? or would I have to buy a program ? if so any suggestions ? does this sort of encryption create an performance hit ?