Why won't GTA V launch?

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When I launch GTA V from Steam, this appears:
"Grand Theft Auto V Launcher has stopped working. Windows can check online for a solution to the problem."
I have played GTA on this computer for many hours before, and I have never had this problem. I have tried restarting my computer, but nothing changes.
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When I try to launch GTA V nothing happens?
Fix #1 \u2013 Verify your game files GTA V may not launch if the game files on your system are missing or corrupted. You should try verifying the integrity of your game files to fix this issue.How do I fix GTA launch error?
- Verify your game files. Obviously, when this error message pops up, the first thing you would do is to verify the game files. ...
- Download and install all Windows updates. ...
- Update your drivers. ...
- Disable background applications. ...
- Run the launcher as administrator. ...
- Delete the Rockstar Games folders.
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