Hello... Trying to install the latest FortiClient for Windows on a Server 2012 Essential system. If I install just the base without any options it works fine. However, if I select to include the Secure Remote Access it gets to Installing Drivers, stops, and rollsback.
Unfortunately I cannot find any error logs to provide reasoning.
I have a very similar problem as you and as a result I'm unable to deploy forticlient to replace our current anyconnect service. Like toddataralco I a 1603 error and install fails at the driver installation. His install is throwing error 13 and 82 (The directory or file cannot be created) as indicated between lines 999 and 1027 in his log file. My error code is 5 which is access denied. I have had multiple versions of my custom installation created and I tried a previous version that used to work and it now doesn't. Something must have changed in windows that causes this to fail. Any help would greatly be appreciated because I want to finish this ssl vpn project.