Hello! I have the same problem as the OP.
I have 10 events in which my computer crashed while rendering different videos in Sony Vegas.
I have a Dell Inspiron 15r laptop – full specs: Dell Inspiron n5520, i7 2.2 ghz ivy bridge, 8gb of ram, ati HD7670m 1gb dedicated graphic card, intel HD 4000 integrated graphic card.
This is one of the messages from the event logger
Log Name: System
Source: Microsoft-Windows-Kernel-Power
Date: 13.5.2013. 23:01:00
Event ID: 41
Task Category: (63)
Level: Critical
Keywords: (2)
User: SYSTEM
Computer: Kiki-MEGALAPTOP
Description:
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event Xml:
41
2
1
63
0
0x8000000000000002
94451
System
Kiki-MEGALAPTOP
278
0xfffffa8008039350
0xfffff880030fb910
0x0
0x2
false
0