Hey there!

Thank you for sharing your issue with us here. My name is Michelle from the Razer Cortex technical support team. I am delighted to be of your assistance. 

With regards to your issue, could you let us know what game you were playing? For some games, the FPS-related features will cause potential performance issues. So, we disabled the FPS overlay feature in Razer Cortex in these games. 

Generally, when you launch a game, Razer Cortex will automatically cease the unnecessary processes in the background. While when you exit the game, Razer Cortex will restore these items. That may be the potential reason that parkcontrol and ghub open when you close the game. 

To resolve this, please go to GAME BOOSTER > BOOST> Processes and deselect these two items. Thus, when you gaming, Razer Cortex would not cease the processes and also will not open them when you exiting the game. 

We look forward to your reply soon. Thank you for your feedback. 

Michelle