So my game would freeze promptly into a session, so bad I had to repeat the initial mission almost 10 times until I tried this: 1. Reset CPU clocks/voltage to defaults. 2. Reset GPU clocks/voltage to defaults. 3. Obtain monitoring software (MSI Afterburner is my choice) to check CPU/GPU temps. 4. Enable the monitoring window through MSI so you can see the max temp your GPU/CPU within a play session. 5. Run D2 along with monitoring software. Long story short I already was monitoring my system temps because of the crashing and nothing was above a danger threshold and nothing was shutting down to prevent damage so I naturally assumed it wasn't an overheating issue. So I changed all my hardware back to default clocks etc... and noticed a small drop in my temps which allowed me to play longer before a freeze/crash. Then I took my PC side case off and realized it was pretty warm but according to my monitoring software it was still within a safe limit. I decided to keep the case off and put a fan next to it blowing kind of inline with my exhaust fans and... NO CRASH FOR 5+ HOURS OF PLAY!! I couldn't believe it. My only theory is that perhaps SOMETHING within D2 causes certain temps to mess with the game. I've restarted and played several sessions today using this method with great success - not a single crash and I even upped my video settings to high/ultra and continued without a crash. So give this a try - check temps first after setting hardware back to default settings and if that still doesn't work open up your case. If that still doesn't work, add a fan or whatever method you have available to safely cooldown your hardware and the air around it. It's not a great fix to have the case open and a fan adding excess dust but hey, it worked for me. Hopefully as we head into the winter months my ambient temps will be low enough to run the game without an open case/fan. Let me know about your results - cheers! Oh and specs: Intel i7-4820k @ 3.70GHz 16GB RAM GTX760