According to the information provided you are experiencing a compatibility problem with this specific software you are using (Poser Pro 2012 in OpenGL mode). If the issue was related to either motherboard or processor it will fail disregarding the program you use. The LED CPU error is related to the hard reboot you need to do after the freezing issue. Our recommendation is contacting the software developer for further compatibility information and specifications. You can also test the system on a minimal configuration and start adding components one at the time to ensure the issue is not related to another hardware component on your system.
Thanks for your reply and clarification. I was afraid the CPU error was a serious hardware issue. I will contact the software makers about this then.