An “MSVCP140.dll is missing” message usually appears when a Windows program expects the Microsoft Visual C++ runtime but cannot load the required C++ standard library file. The best fix depends on whether the runtime is absent, damaged, mismatched with the app architecture, or blocked by a failed application installation.
Why the error appears
MSVCP140.dll belongs to the Visual C++ runtime family used by applications compiled with Microsoft C++ tools. A program can fail at launch when the expected runtime is not installed, when a repair was interrupted, or when the app ships with an incomplete dependency set.
A missing-file message does not automatically mean the DLL itself should be copied into a Windows system folder. The application may need a full runtime package because companion libraries such as VCRUNTIME140.dll can be required at the same time.
Check the application architecture first
A 32-bit application normally requires the x86 runtime even when Windows itself is 64-bit. A 64-bit application normally requires the x64 runtime. Installing only one architecture is a common reason an error remains after an attempted repair.
If the program documentation states an architecture, match that architecture. If it does not, reinstalling the application can often restore the dependency chain more reliably than moving individual DLL files.
A safer repair sequence
Restart Windows and retry the application, then repair or reinstall the application that shows the error. After that, repair or reinstall the matching Microsoft Visual C++ Redistributable runtime from a trusted source. Run Windows system file checks only when broader operating-system corruption is suspected.
If you use a downloaded DLL archive, scan it before extracting, confirm the intended architecture, and avoid replacing newer system copies with an older unknown build. A single-file replacement should not be treated as a universal fix.
When the error still returns
Repeated failures can indicate that the application is loading a DLL from its own folder before Windows runtime locations, that antivirus software quarantined a component, or that another dependency is missing. Check the exact error text and the application event details before repeating the same fix.