I am having a very similar issue when playing Lord of the Rings LCG
I was finally able to resolve this issue by installing Windows EMET (Enhanced Mitigation Experience Toolkit) and then adding OCTGN to the list of managed applications. This does DEP, ASLR and SEHOP to prevent various issues with programs causing Windows to fail. This would suggest that OCTGN has problems with how it stores/accesses memory.
Mrcclassical: If you need help with this solution please let me know and I can type something up for you.
If it is as simple as installing EMET and adding OCTGN to the list of managed apps then I should be good, but I will let you know otherwise.
Alright I installed EMET 5.0 and added OCTGN in the Apps section with the default options. Was there anything else you did in EMET?
Make sure DEP, ASLR and SEHOP are set to Application Opt In. Click on Apps in the Configuration section of the Ribbon bar and then check every single option to the right of OCTGN. Some of them I'm sure are not necessary but I just checked them all before tested which is what worked for me.
It is always nice to see a thread where someone had, and subsequently solved, the very technical issue you are having.
Hopefully this works. I'm still trying to load the microsoft site. How does a company like Microsoft get by with such a poor web design team?
@Hodor: Indeed it is. I hope this works for you as well, and I totally agree about the MS site.
That's how it's set up. Worked like a charm.
@illusionistlynx, thanks for sharing that. They seemed out of place, but if I'm not the only one then ok!
I'm running OCTGN on 64-bit Windows 7 with 8 GB RAM and a 3.8 GHz quad core AMD processor. It's the only program that causes my computer to freeze up this way. When it happens, I hit Ctrl+Alt+Delete and Switch User, log in with a different account, open Task Manager, log off the 1st account running OCTGN, and then log back in with the 1st account. Relaunching OCTGN at that point works fine. (I figured this was better than powering my computer off with the physical power button each time it froze while running OCTGN.)
Yes, EMET appears to be configured as you described.
After posting my previous comment, I went into OCTGN Options and unchecked "Use Window Transparency" and "Use Hardware Rendering" to see if that makes a difference. I played a few games for a couple of hours, and it didn't freeze - but it wasn't long enough of a test to know if the Options changes really had any effect.