We have just recently upgraded all our computers and installed Solidworks 2010sp2.1 On my computer I have been running 4 weeks with 2 crashes. Today one of our engineers was complaining that he had repeated crashes (20 today) and I was asked to help as I had only had 2 crashes in 4 weeks. I opened his assembly and it instantly crashed, tried 3 more times and it crashed every time. Out of 3 computers only 1 would open this assembly and not crash. This assembly has maybe 30 compomnents, no arrays/lofts/sweeps...pretty simple stuff. I have seen this before, some assemblies will crash on some machines but run on others. What I find more interesting is that now, my machine that has crashed only twice in 4 weeks has now crashed 8 times in 3 hours while doing very simple tasks. I have gone through the option panel looking to see if the assembly I loaded that crashed changed any of my options causing this problem but, cannot see anything I would change. I cannot think of what might have changed on my system that I would consider stable. Our VAR is looking into it but, they have rarely been useful. Any ideas?