Like the most i was happy to have the game on pc.
I install it but nothing happens. Sending mails tot Rockstar which these answered always.
Then, one day, i did this
Normal install is ---> c:\Program Files\Rockstar Games\L.A. Noire
I did ---> c:\RockstarGames\L.A.Noire (remove the spaces between Rockstar Games and L.A. Noire also remove Program Files)
The game start!