You're trying to open an application and an Error message saying "api-ms-win-crt-runtime-l1-1-0-dll is missing from your device" pops up? it means that Universal CRT, which is part of the Visual C++ Redistributable has either failed to install properly or that the api-ms-win-crt-runtime-l1-1-0.dll file has gone missing or become corrupted. Install api-ms-win-crt-runtime-l1-1-0 (1).dll to fix missing or corrupted DLL errors.