Hey, can you do me a favor and update your profile to reflect the Zorin OS version you are using?
Click Here To Learn How To Update Your Profile
For now however, I am going to assume your using Core, because it comes with Gnome, and Gnome classically uses a lot of RAM. I prefer Stacer BTW for providing system resource information. You can find Stacer in the software center.
Stacer screenshot of my old dual core workstation machine.
