A successful MSVCP140 DLL install is less about copying one file and more about restoring the dependency set expected by an application. The safest order is to repair the application and its supported runtime first, then use a standalone file only when you have a specific reason and understand where the program loads it from.
Prefer runtime installation over manual placement
MSVCP140.dll normally works with related Visual C++ runtime libraries. A supported runtime installer manages architecture, servicing, and companion files together. Manual placement can bypass those relationships and cause a different launch error later.
Application folder vs Windows folders
Some applications use local copies in their own installation folder, while others rely on shared runtime locations. Placing a DLL beside the application can change which copy the Windows loader selects. Never overwrite a system copy just because an online guide suggests a folder name.
A clean installation sequence
Close the affected app, back up any application-local DLL you intend to change, repair or reinstall the app, repair the matching runtime, restart if requested, and test again. If a standalone archive is still needed, verify its architecture and scan it before extraction.
How to know the install worked
The correct test is whether the original application launches and remains stable. Do not continue replacing DLL files after the error is gone. If a new runtime error appears, treat it as new diagnostic information rather than evidence that more random files should be copied.