Mine is even worse! I'm just playing along and suddenly BAM! the computer reboots! I'm so sick of having to start all over again!! Does anyone know what's going on?!
P/S/ by the way, I noticed that if I delete some saves, it doesn't crash...

Yours is rebooting because you have the "restart on critical errors" box checked in your computer settings. I suggest unchecking it (My Computer -> Properties -> Advanced -> Startup and Recovery) and then you'll know which driver is causing this critical error.

I have the same thing, I'm fed up already—sometimes it's the nvidia driver, sometimes a usb driver, sometimes the kernel driver, or something else. The most annoying part is that there's no pattern to the system. Temperatures are all normal. I've changed all the drivers.
MSI NEO2
P4 3006 MHz
1024 MB
MSI GF6600GT

And in the Trap mission, I can't get the boots; they say you have to take out the immortals, but where do I find them?