Recently I’ve encountered a problem when trying to launch GTA V (installed through Steam). Every time I tried to run a game it stopped with an error:
GTA V Launcher has stopped working
I’ve read through Rockstar support page and some weird suggestions like turning off display drivers until I found a simple solution to this problem in my case.
So, the cause was that Social Club launcher downloaded an update and couldn’t install it for some reason. One solution is to go to some Rockstar page and download it from there. On the other hand it is already downloaded to your computer, just visit:
<Your Steam Folder>\steamapps\common\Grand Theft Auto V\Installers
and there you will find Social Club Installer. Run it, let it update some stuff and after that the game will run smoothly!