How to uninstall fortinet vpn client if the uninstall button is grayed out

1. make sure forticlient is not loaded/running.

2. open the command prompt as administrator.

3. run  wmic product where "name like 'Forti%%'" call uninstall /nointeractive 

4. close all programs as at the end the computer will reboot.

NOTE: if you have more than one previously install forticlient, you will need to rerun the steps above until *all* previous instances are removed.