Welcome to the fun. Looks like AC is giving up on fixing this. I have just bought new machines for much of my office - all brand new late generation processors and the latest Windows. So Chris, I'm told I should replace them with older computers so AC doesn't crash on them? This is a real failure for the programmers at AC not to figure this out. Look at the error codes being thrown. You can't track down what is causing the unhandled exceptions?