Alright, I have been playing NS a long time, well over a year, and just recently my game has started freezing up completely after playing for about 30 minutes to an hour. I haven't been able to find a pattern to it, and it locks my computer up completely. I have to manually shut my computer off and back on in order for me to able able to do anything. The game lags for a moment, then the screen dims a little and then freezes, the sound cuts out and I cannot do anything, other then the manual turn off of my computer. I play on the same computer I have been playing on for months, and I haven't installed any new software/hardware or changed anything. It started to happen around the time of the latest Steam patch. Can anyone help me?