| • | Windows NT 4.0, Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008 or Windows 7 |  
 | • | Administrator privileges (for direct disk access) |  
   
Known problems and limitations: 
  
| • | The program can decrypt protected files only if encryption keys (at least, some of them) are still exist in the system and have not been tampered. |  
 | • | Only Basic (but not Dynamic) NTFS partitions are supported. |  
 | • | For all systems but Windows 2000, the password of user who encrypted the files (or Recovery Agent) is needed for decryption. |  
  
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