Here is how I fixed the installer for smite, hope it helps you :D NOTE: THIS DOES NOT FIX ALL PROBLEMS!!! IF IT DOESNT WORK CHECK THAT SMITE ISNT BEING BLOCKED BY YOUR FIREWALL AND TRY AGAIN. I DO NOT KNOW ANY OTHER FIXES, SO IF THIS DOENT WORK FOR YOU I AM SORRY BUT I CANNOT HELP.
Here are the steps:
Click Start Type Regedit Click Local Machine Click System Click Current Control Set Click Services Delete HiPatchService Uninstall a program called Hi Rez and Authenticate Service Re-Install Game using Installer (Twice)