Meshing large assemblies

Anyone else having issues with SW meshing of 'largish' assemblies?  We have noticed in 2015 v5, 64b that when a 'largish' assembly (100+ bodies/parts) that SW "grabs" the computer and "steals" the cursor so you can't effectively use the computer for anything else.  Is there something I'm missing?  The application is running at normal priority.  Machine has plenty of cores/RAM and is not running at 100%.

SolidworksSimulation