Creo ModelCHECK > config_init_options > MC_ENABLE
  
MC_ENABLE
<Y/N/A>
Y—Enables Creo ModelCHECK all the time.
N—Disables Creo ModelCHECK.
A—Prompts you when Creo Parametric starts whether to enable Creo ModelCHECK or not.