I created a similar thread 4 months ago, but there was a confusion between the named version and what was released. So it's a bit here and there.
http://malwaretips.com/Thread-FortiClient-Lite
Whether it has been updated or not, I haven't a clue. :s
I have tested FortiClient (Free) -over a year ago-, and it does run with a lot of processes but not sure how it stands against todays' malware.