The launcher uses the Internet Explorer components of Windows...so you would want to be adjusting things at either the OS level (inetcpl.cpl in the search/run box) or from within Internet Explorer itself for the browser related items (like TSL encryption(the new 3.x SSL) and trusted sites and such).
You should probably also create exceptions in your chosen security applications for the executables as well to make sure they have internet access and such (ffxivlauncher, ffxivupdater, etc.--6 or 7 total nested in the different subfolders).
