Windows 7 - Folder that holds VST effects?

I am trying to use VEPro to host some of my sample content, and want to use the bundled effects like the Voxengo EQ etc as inserts in VEPro. I was able to find all my third party effects, and some of the bundled Cubase effects, but not the ones that I need for these specific tracks.

I looked around in my directories and wasn’t able to find them. Do they exist in some hidden directory, and does Steinberg even allow us to use them in a program like VEPRO?