After purchasing Music Production Suite 6, you will receive an email which includes your Guitar Rig Pro 7 serial number and Native Instruments effects serial, as well as the Music Production Suite 6 serial, Exponential Audio iLok license codes, Brainworx serial number and Melodyne 5 Essential serial number.
Guitar Rig 7 and the NI effects are not installed via the Product Portal.
To download and install Guitar Rig 7 Pro and your NI effects, create a Native Instruments account (if you haven't already), install Native Access and add your serials to authorize and install your products.
You can create a Native Instruments account on this page: https://www.native-instruments.com/account
Download and install Native Access: https://www.native-instruments.com/specials/native-access-2/
Start Native Access and log in. Click "Add Serial" and enter the serials you have received via email.
Example of an NI serial number: GR6U6-BC8KD-97D95-4CD28-XXXXX
For more information on downloading and installing all the products from Music Production Suite 6, please see this article:
How to Install and Authorize the Music Production Suite 6 Bundle