1. Select the folder you wish to encrypt.
2. Right-click the folder and click Properties.
3. Click the Advanced button.
4. Check "Encrypt contents to secure data" option.
5. Click Ok.
Microsoft Windows XP home users
1. Select the folder you wish to encrypt.
2. Right-click the folder and click Properties.
3. Click the Sharing tab.
4. Check the box Make this folder private