Encrypting folders and files is a way to protect them from unwanted access. Encrypting File System (EFS) is a feature of Windows that you can use to store information on your hard disk in an encrypted format. Encryption is the strongest protection that Windows provides to help you keep your information secure.
When you encrypt a file or folder with EFS in Windows 10, its icon will have a lock overlay at the top right corner to indicate that it’s an EFS encrypted file or folder.
This tutorial will show you how to customize or remove the lock icon overlay on files and folders encrypted by Encrypting File System (EFS) in Windows 10.