How to Encrypt Your Files or Folders
Right-click the file or folder to encrypt.
A small pop-up menu appears.
The Properties menu appears.
Click the Advanced button on the General tab.
You’ll find the General tab at the top of the window; among the tabs that look like hanging folders.
In the Advanced Attributes box, select the Encrypt Contents to Secure Data check box.
Encrypting your files makes sure that no one who intrudes on your files (or your wireless network) can read them.
Click OK to close the Advanced Attributes box, and then click OK to close the file or folder’s Properties dialog box.
An Encryption warning may appear. When you want only the file, and not the entire folder, encrypted, choose the Encrypt the File Only option and click OK.