Cause: Fortinet requires a valid login. Free downloads do not require a contract, but you must register a free account. Fix: Create a free "Support Account" at support.fortinet.com.
(Note: Fortinet occasionally updates their UI. If you are a home user, look specifically for "FortiClient VPN" under the product dropdown to avoid downloading the heavy enterprise agent.) download forticlient tools
Cause: You downloaded the full endpoint protection suite without an EMS license. Fix: Uninstall full client and download the FortiClient VPN only tool. The full client will demand a license after a 30-day trial. Cause: Fortinet requires a valid login