Game Crashes and PC instantly rebooted afterward

[MrKRB]

So, I've been enjoying playing Warframe for months since around March. No major problem until today when I tried to do Draco Missions on Ceres. A few minutes in and the game game suddenly froze, sound loops a fraction of a second loop for a few seconds, then PC reboots me back to start-up. All without warning and no error message at all, just crashing the whole compy. I tried again and the same thing happens each time I try to do the mission. 

Specs

OS: Windows 8

CPU:  AMD fx-6300 3.5ghz 6-core processor

RAM: 8GB

GPU: GeForce GT 740

GeForce Game Driver Version: 364.72

The game performs really well normally with rarely any hiccups on the FPS. Seems only today it's starting to have problems and I hope there's a solution for this.

 

[carnaga]

Check with Reliability Monitor what caused the error:

http://windows.microsoft.com/en-us/windows7/how-to-use-reliability-monitor