HELP_RESTORE_FILES.txt and other files have been identified only by a few anti-virus engines as malicious: TROJ_CRYPTESLA.CAG, Win32:Crypt-RXH [Trj], Win32/Filecoder.EM, Trojan.Agent.ED. Once installed, it encrypts your files, changes your desktop image and displays a red encryptor window saying Your personal files are encrypted.