Sup champ,

If you're receiving

Code:
unable to execute file:
C:/ Program files (x86)\ Freestyle Gunz \ Launcher.exe

Create Process Failed; code 740.
the requester operation requires elevation.
That means you don't have admin rights and on the FAQ thread which Dave referred to are steps on fixing that error.

Moreover regarding the config.xml - pops up because you never ran the game successfully and if you cannot patch by downloading Gunz.exe - your firewall is blocking you from doing it, if you think you turned it off but you still cannot patch then I assure you - you did not turn it off completely