Advanced EFS Data Recovery - Version 3.0 A program to recover/decrypt files encrypted on NTFS (EFS) partitions created in Windows 2000 and Windows XP. Files are being decrypted even in a case when the system is not bootable and so you cannot log on, and/or some encryption keys have been tampered. AEFSDR effectively decrypts the files protected under Windows XP (including Service Packs 1 and 2) and all versions of Windows 2000 (including Service Packs 1/2/3/4).