The "Error reading setup initialization file" and "The setup file may be corrupt" errors when installing Surfer usually mean that the EXE file was not fully downloaded. Sometimes company firewalls or virus checkers prevent the last few bytes of a file from being downloaded. If you can, try disabling the firewall or virus checker and then downloading the file again.
If that does not help, please right click over the file you downloaded and click Properties. Note the file size of the file you downloaded (in bytes) and email this information along with the name of the file you downloaded to email@example.com.
Updated January 19, 2017