api-ms-win-crt-runtime-l1-1-0.dll is missing when opening Microsoft Office file [closed] June 7, 2022 by Tarik Billa The default solution is to install KB2999226 of Microsoft. More Related Contents: Should I compile with /MD or /MT? How to convert .crt to .pem [duplicate] Should I link to the Visual Studio C runtime statically or dynamically? How to use .key and .crt file in java that generated by openssl? How do I get the file HANDLE from the fopen FILE structure?