The large memory patch... To be honest. Poser has been on my machine for so long that I don't know whether I installed that or not... Wasn't it only needed for versions before 4.0.3? 4.0.3 is what I'm running. In any case, Poser has been running perfectly on this machine for a long time, before it suddenly died last night, so I don't think that's the problem. If I ever used that patch, it will be somewhere on my poser CD collection. I'll have a look and run it again, but I honestly don't think it will help.