concrt140d.dll: download the file and fix the error

64-bit (x64) Microsoft Visual C++ 2015-2022 Scanned by antivirus

concrt140d.dll is the debug version of a Microsoft Visual C++ 2015-2022 file, intended for developers. Its official description: “Microsoft® Concurrency Runtime Library”, by Microsoft Corporation.

If it is missing or damaged, Windows displays for example: “The program can't start because concrt140d.dll is missing from your computer.” Two methods can fix the error, below.

Method 1 · quick · about 1 minute

Download only concrt140d.dll

Ideal if only this file is reported missing: you replace a single file, without reinstalling anything.

⇓ Download concrt140d.dll .zip file: the DLL + its instructions · downloaded 2,866 times

Version: 14.00.24212.0
Architecture: 64-bit (x64)
Size: 781.63 KB
Publisher: Microsoft Corporation

Then:

Extract concrt140d.dll from the zip file and copy it to the folder of the program showing the error (where its .exe file is).
Still getting the error? Also copy it to C:\Windows\System32 (64-bit Windows only), then restart.

64-bit version: it does not work with a 32-bit program. In that case, use method 2.

SHA-256: 87d3e884858c661abb2e6ce374fddfcc29cabca9215c5b2f5de9ed2e6247070e · Check on VirusTotal · Product: Système d'exploitation Microsoft Windows

Method 2 · complete · for developers

Install or repair Visual Studio

Debug files (ending in “d”) are not redistributable: Microsoft only provides them with Visual Studio. A program that asks for them was compiled in debug mode.

If you use the program: ask its publisher for a “Release” (non-debug) version.
If you are a developer: install or repair Visual Studio with the “Desktop development with C++” workload.

Complete guide: Visual C++ errors (msvcp, msvcr, vcruntime)

Error messages related to concrt140d.dll

The program can't start because concrt140d.dll is missing.
Failed to load concrt140d.dll
Error loading concrt140d.dll. The specified module could not be found.

Why does this error occur?

Microsoft Visual C++ 2015-2022 is not installed: new computer, reinstalled Windows, or a program that does not install its own prerequisites.
The file was deleted or damaged: another program was uninstalled, an overly aggressive cleanup, an antivirus.
Wrong architecture: a 32-bit program cannot use the 64-bit version of the DLL, and vice versa.

Files of the same family (Microsoft Visual C++ 2015-2022)

concrt140.dll mfc140.dll mfc140u.dll msvcp140.dll msvcp140_1.dll msvcp140_2.dll msvcp140_atomic_wait.dll msvcp140_codecvt_ids.dll ucrtbase.dll vccorlib140.dll vcomp140.dll vcruntime140.dll vcruntime140_1.dll

Frequently asked questions

Is concrt140d.dll a virus?

No: it is a legitimate Microsoft file. Only be wary of a copy found outside C:\Windows or a program’s folder; you can compare its SHA-256 fingerprint with the one shown on this page.

Should I install the 32-bit or the 64-bit version?

On 64-bit Windows, install both: a 32-bit game needs the x86 version, even on 64-bit Windows. On 32-bit Windows, only the x86 version can be installed.