Describe file and folder encryption in Windows (not how you encrypt a file).

What will be an ideal response?

In Windows, files and folders can be encrypted using the Windows Encrypted File System (EFS). This encryption works only with the NTFS file system and business and professional editions of Windows. If a folder is marked for encryption, every file created in the folder or copied to the folder will be encrypted. An encrypted file remains encrypted if you move it from an encrypted folder to an unencrypted folder on the same or another NTFS volume.