Q: How does Windows Vista’s BitLocker Drive Encryption compare with Windows XP’s Encrypting File System (EFS) for protecting data on a laptop?

A: I was a long-time EFS user, but I recently stopped using it in favor of BitLocker. EFS works on a file-by-file basis, whereas BitLocker encrypts the entire volume and eliminates many of the laptop vulnerabilities that let information leak out of encrypted folders and into unencrypted folders. EFS is al...