It is highly unsafe to download security software from third-party "mirror" sites or unauthorized repositories. Attackers often seed malicious software disguised as VPN clients on free download sites.
If your organization uses FortiClient EMS (Endpoint Management Server) , the specific 7.0.2.0090 installer can be deployed directly from your EMS console or downloaded from the "Software Deployment" section of the server. forticlient 70290 download link