A certain spell causes my entire to freeze

[Usmanov]

I bought the game through steam. I'm just arriving on the continent Verona (or whatever it's name is) and traveling along the coast i bump into a Paladin. I fight it. First time I see paladins in the game.

After some time the opponents paladin unit bends to cast spell "Prayer", when he gets to his feet my computer freezes.

Anyone experience this before?
I have version 1.3.1 (build 6171)
I have verified the files through steam without any faults.

Having searched on your forum I notice that other players have been discussing the spell at it appears to be working for them.. ..any clues?
I have to reboot so it is a total blackout.

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System Information
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Time of this report: 9/13/2011, 00:26:29
Machine name: USMANOVPB
Operating System: Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.vistasp2_gdr.110617-0336)
Language: Swedish (Regional Setting: Swedish)
System Manufacturer: Packard Bell BV
System Model: MCP73
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz (4 CPUs), ~1.8GHz
Memory: 3326MB RAM
Page File: 2935MB used, 3936MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
DxDiag Version: 7.00.6002.18107 32bit Unicode

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DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
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Card name: NVIDIA GeForce 9600 GS
Manufacturer: NVIDIA
Chip type: GeForce 9600 GS
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0623&SUBSYS_9420174B&REV_A1
Display Memory: 2160 MB
Dedicated Memory: 753 MB
Shared Memory: 1407 MB
Current Mode: 1680 x 1050 (32 bit) (60Hz)
Monitor: Allmän PnP-bildskärm
Driver Name: nvd3dum.dll,nvwgf2um.dll,nvwgf2um.dll
Driver Version: 8.16.0011.9062 (English)
DDI Version: 10
BGRA Supported: Yes
Driver Attributes: Final Retail
Driver Date/Size: 8/17/2009 00:57:00, 7569920 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-4563-11CF-9D57-2BB41EC2C535}