i installed bitlocker on my windows vista ultimate, and at first it seemed ok. but now, when i try to decrypt something, it says "access denied" i am using an administrator account, why do i not have permissions for that? now half of the files on my computer is encrypted, and the only way to decrypt them is to move them to another computer. anything that is put on desktop is automatically encrypted, and i cant change it after that. i tried going into the permissions, giving myself full rights, but some reason it doesnt allow me, saying i dont have permissions to make any changes. ?????