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When you encrypt a file or folder, you might be prompted to backup your your file encryption key to help avoid permanently losing access to your encrypted data. Note: Encryption will be disabled for a folder, if you compress it, move it to a ZIP archive, or copy to a location that doesn't support NTFS encryption with EFS. When you encrypt a folder, new files saved into that folder will automatically be encrypted. When a folder or file is encrypted using Encrypting File System (EFS), the File Explorer app shows a pad lock overlay icon for such a file or folder. This is the strongest protection which is available in Windows to protect individual files and folders without encrypting the whole drive.
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Other user accounts cannot access your encrypted files, neither can anyone from the network or by booting into another OS and accessing that folder.
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