Everytime I try to render using 3ds Max Design 2011, my computer shuts down. The default renderer is mental ray. I've rendered before with this computer using other programs like Kerkythea ECHO 2008 and Vray, but this is the first time I encounter this problem (now with mental ray).
My computer works perfectly fine, as it is almost new (I bought it four months ago).
I know I'm not running out of memory, because I have a 8gb RAM, and the memory sticks are ok, according to Memtest86+.
I don't know if it may be an overheating problem (it reaches 82°C when rendering).
One more thing. I've noticed that this problem happens only when rendering a complex model or reflective/refractive textures/materials (such as glass, polished materials etc)

Here are my PC Specs:

Operating System
MS Windows 7 Ultimate 64-bit
CPU
Intel Core 2 Duo E7500 @ 2.93GHz
Wolfdale 45nm Technology
RAM
8.0GB Dual-Channel DDR3 @ 533MHz (7-7-7-20)
Motherboard
Hewlett-Packard 2AA2 (CPU 1)
Graphics
NVIDIA GeForce G210
Hard Drives
977GB Western Digital WDC WD1001FAES-60Z2A0 (SATA)
Optical Drives
hp DVD A DS8A4LH
RELCNC 16J0TAF SCSI CdRom Device
Audio
Realtek High Definition Audio