The "crashing on first boot" issue is usually a missing Visual C++ redistributable, not the crack. Check your drivers.
Today, if you manage to find a surviving mirror of -R.G.Mechanics-.Uncharted.4.-A.Thiefs.End-.-2015- and run the setup.exe, you’ll likely get nothing but an error: “Could not locate proper DirectX 11 device.” But for a moment—clicking that .exe, watching the installer extract files into a folder named “U4_REPACK” — you might feel what thousands of PC gamers felt in late 2015: the thrill of almost. -R.G.Mechanics-.Uncharted.4.-A.Thiefs.End-.-2015-