unexpectedly shut-down, HELP, attached Log

Mistake, system does not shut down, it just freezes,

this is been happening especially when gaming,
My system
Windows 7 pro,
i7-920 @ 3.20, Collermaster V8 fan
GTX460 in SLI
12gb ram

here is the log, let me know if you need more info. Thanks in advance

Log Name: System
Source: EventLog
Date: 12/16/2012 11:00:24 AM
Event ID: 6008
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: Diego-PC
Description:
The previous system shutdown at 9:26:13 AM on ‎12/‎16/‎2012 was unexpected.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="EventLog" />
<EventID Qualifiers="32768">6008</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2012-12-16T19:00:24.000000000Z" />
<EventRecordID>330269</EventRecordID>
<Channel>System</Channel>
<Computer>Diego-PC</Computer>
<Security />
</System>
<EventData>
<Data>9:26:13 AM</Data>
<Data>‎12/‎16/‎2012</Data>
<Data>
</Data>
<Data>
</Data>
<Data>169497</Data>
<Data>
</Data>
<Data>
</Data>
<Binary>DC070C000000100009001A000D005003DC070C000000100011001A000D0050033C0000003C000000000000000000 000000000000000000000100000031000000</Binary>
</EventData>
</Event>

Work through these Troubleshooting Steps for Windows 7.

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