GTA IV requires specific Visual C++ packages to function correctly. If these are corrupted, the 0xc00007b error is almost guaranteed:
If the DirectX fix does not resolve the issue, the problem may lie within the Visual C++ Redistributable packages. GTA IV relies heavily on older versions of Visual C++ (2005 and 2008), which modern Windows installations may not handle correctly. gta iv application error 0xc00007b