Installing EastWest VSTs and Helion Sonic Error Message

Hi there. I’m new to Cubase and am trying out the Cubase 8 Elements trial. I have two problems.

  1. I recently purchased the student 14.99 a month payment plan with EastWest to pick 7 VSTs to use whenever I want and I’m trying to install those into Cubase and I don’t know how to.
  2. Whenever I open Cubase Elements 8 and click “Scoring” to make a new String Quartet and when I click create, I get the message “The plug-in “HALion Sonic SE” could not be found for instrument Track “Violin 1”!” and that message is repeated for the rest of the quartet instruments.

Help please!!!