Type: futile –encrypt the zip file or compressed folder, which appears in Windows explorer. Once the password is entered, it will become active and the file or folder will be encrypted. Method 2. Use Windows 10s File Explorer, right-click (or press and hold on touch-enabled devices) the file or folder .zip or compressed folder that you wish to password protect and if the password has not been entered already in the EFS, select the encryption method you want to use. In this case, the option to Encrypt and Decrypt is selected. The option to Encrypt the whole folder is found right next to the option to Encrypt just the .zip file. Once the file is encrypted and the password entered in EFS, select to Encrypt to Disk option. When your selection is made, type and hit enter your password. A warning will appear at the top of the window and a confirmation message will remain there when the password is correctly entered. The icon of the password will now appear under the title in the top-left corner. To close the password protection window, right-click anywhere on the file, go to open properties and select the option to Delete. When the file is successfully protected, it will be called Protect.zip or .enc with the “Encrypting” filename. If the file name was not found, or it has not been created, then it will be named.zip or .enc with the “Encrypting” filename. Method 3. Use Windows 7 and later's Encrypting File System (EFS). This method works only for the .zip file and folder. Open File Explorer : Start Menu > File Explorer. Type: futile –encrypt the zip file or folder. Press Enter. Method 4. Use Windows 8 and later's Encrypting Folder (Windows Explorer). This method works as long as the folder or zip file already contains the password. To password protect a folder, right-click the folder or zip and choose “Encrypt to EFS” from the context menu. The folder will decrypt at the bottom of the window with a password. Method 5. Use Linux/BMC. The password-protected zip file / folder will only encrypt one .zip file and the password must be entered in the futile command. Steps 1.