When it comes to protecting the data on your computer, you can’t do better than strong encryption. Properly encrypted, your files are safe even if a ne’er-do-well gains access to your computer, either physically or through a network. In the past, we’ve discussed how to use various encryption tools to encrypt individual files or create virtual, encrypted drives. Now, we’ll look at how to get maximum security by encrypting your boot disk using the BitLocker full-drive encryption system that’s built into Windows 7 Ultimate and Enterprise.