Thanks to EP_X0FF for the sample.
This trojan blocker ( MD5: 832d2a45c441a9e095ffcc4373be1f35 ) prevents all software execution.
To remove the Trojan (and unlock windows), infected users need to enter a valid serial number.
Number to Call: 89091621343
Number to Call: 89629880508
Code to unlock windows: H701630
Already noticed on the past: here (25 Apr 2k11) ~ here (4 Jul 2k11) ~ here (9 Jul 2k11)