I have this problem when it is taking way too long to inject.  In Windows, CTRL ALT DEL doesn't always work and is slower.  I just right click on the program icon on the task bar and select close.  It'll give you that message about sending the error to Microsoft which I select No to.  As was said above, you will lose anything not saved so it really isn't the best solution.

I frequently have this problem with M3 & D3, and I have all the morph packs for them.  I've found some vendor product PZ2's have incorrect data in them such as pointing to the wrong or non-existent location.  This is why I find myself constantly going into the files and correcting the erroneous data.

Poser 2, 3, 4, 5, 6, 7, 8, 9, 10, Pro 2014, 11, 11 Pro