STEP 1: Visit https://www.origin.com/
STEP 2: Click “Download Origin”
STEP 3: Once the client is installed and has started, log in with your username / password (create one if you don’t have).
STEP 4: Once logged in, click the small options icon in the top right corner.
STEP 5: Select “Enter a product code…”
STEP 6: A window will prompt you to enter the code you purchased from us.