is the Unreal Engine 4 Prerequisites Installer . Its primary job is to ensure that your Windows operating system has all the necessary third-party software components required to run applications developed with Unreal Engine 4.

If you are suspicious of the file, you can verify its legitimacy by checking two factors:

int main() // Check if Visual C++ Redistributable is installed HMODULE hModule = LoadLibrary(L"api-ms-win-crt-runtime-l1-1-0.dll"); if (hModule != NULL) std::cout << "Visual C++ Redistributable is installed." << std::endl; FreeLibrary(hModule); else std::cout << "Visual C++ Redistributable is not installed." << std::endl;