Using Solidworks while running a simulation

When I'm running a simulation on my office system, the solidworks interface is frozen.  I can't manipulate the current model or open any others until after the simulation has finished.  I thought this was normal and often keep 2 or 3 SW instances open so I can keep working while a simulation is running.  Recently, I noticed that on my home computer I can still use the SW interface while a simulation is running.  While I can't modify the study conditions, I can minimize the current model and open another in the same SW window.

I'm just curious if there is a setting somewhere I'm missing to enable this feature on my office system.

Thanks very much,

Andrew

SolidworksSimulation