Hi Natalie.
Funnily enough the last poster was trying to get it to work on the Ubuntu 16.04.
There are probably two Python installations on your computer: the one that comes with Blender and the one on your system. If you follow my instructions for the previous poster that will install all the dependencies you need in Blender's Python folder except for psutil which doesn't work by that method. Instead copy the psutil folder from the system's python directory to Blender's one and you should be good to go.
If that does not work you could try renaming Blender's Python folder and seeing if Blender then looks for and finds the system Python installation.
Ryan