Solidworks minimal cpu usage

I have Solidworks 2015 which operates on one core of my processor. The computer has 16 cores and on big assemblies the task manager shows 3% of the cpu being used and 97% is idle. My IT guy says that's the way Solidworks 2015 is set to work. Therefore it takes 45 minutes to 1 hour for 1 command to complete. Is there anyway to get Solidworks to use all 16 cores so I can get some speed?

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