To summarize the correct course of action:
In simple terms, your 64-bit application is trying to call a Windows version function, and the system uses apimswincoreversionl111dll to know where that function actually lives.
Most "api-ms-win" errors stem from missing runtime components. Modern 64-bit software relies heavily on these packages. Go to the official .
On modern 64-bit systems (including all Windows 11 versions and most Windows 10/8.1 installations), 64-bit applications require the of this DLL to function. If you are using a 64-bit OS, the system typically maintains both 32-bit and 64-bit versions to ensure compatibility with all types of software. How to Install api-ms-win-core-version-l1-1-1.dll (64-Bit) 1. Reinstall the Visual C++ Redistributables
installed, which enables modern CRT functionality on older Windows versions. Super User
If you see this error while trying to open Microsoft 365 apps on Windows 8, it is a known compatibility roadblock. Microsoft ended support for Windows 8, and newer apps require updated system files.
However, these files are meant to be copied manually or registered.
If the file exists but is corrupted, Windows has a built-in tool to repair it. Type in your Windows search bar. Right-click Command Prompt and select Run as Administrator . Type the following command and hit Enter: sfc /scannow
These errors frequently arise after software updates (such as Office 365 Build 13001.20384) on unsupported systems like Windows 8. Microsoft Learn Installation and Repair Guide If you are missing this file, do
If you have obtained the legitimate file from another Windows installation, you must place it in the correct directory. On a 64-bit system, the 64-bit DLL files belong in the SysWOW64 folder, not System32 . C:\Windows\SysWOW64\
These files are often outdated, bundled with adware, or injected with malware that can compromise your 64-bit operating system. Additionally, pasting a lone DLL file into your directory rarely fixes the underlying issue, as the software will usually just trigger a different missing DLL error immediately after. Always use official Microsoft updates and redistributables instead. Conclusion