Hello, remoman.
Welcome to Microsoft Community!
I noticed that you are trying to install Forticlient at the Surface Laptop 7.
Since the Surface Laptop 7 is equipped with a Qualcomm Snapdragon CPU, this hardware feature dictates that the current system architecture is ARM. I think that application's compatibility with the ARM architecture is the key to this situation.
Windows Arm-based PCs FAQ - Microsoft Support
Forticlient will not work on your current device if it does not have a version of the application for ARM64 systems. You can contact Forticlient support to find out if they have a version of the application or plan to release one for ARM.
The above is real information that I can share with you at this time.
Thank you for your understanding and support of the Microsoft community.
Best Regards.
Leo.L - Microsoft Community Support Specialist