How to confront malware of the family Trojan-Ransom.Win32.Xorist?

Malware of the family Trojan-Ransom.Win32.Xorist is designed for unauthorized modification of data on a victim computer. It makes computers uncontrollable or blocks its normal performance. After taking the data as a “hostage” (blocking it), a ransom is demanded from the user.

The victim is supposed to deliver the ransom to the pirate, who is promising to send in return a program which would release the data or restore normal performance of the computer.

There is a utility to confront malware of the family Trojan-Ransom.Win32.Xorist - XoristDecryptor.exe.
The utility XoristDecryptor.exe is provided with a GUI.

http://support.kaspersky.com/faq/?qid=208280932