A CONCRT140.DLL-specific sequence based on Visual C++ Runtime and its supported delivery through Visual C++ v14 Redistributable.
Record the affected program, exact CONCRT140.DLL message, Windows version, and whether the app is 32-bit or 64-bit.
Setup has detected an installed package.
Open Settings > Apps > Installed apps. Find the supported Microsoft Visual C++ Redistributable, open More options, choose Modify, and select Repair in Microsoft Visual C++ Setup. If it is absent, install the official package matching the application's architecture.
□ Restart Windows after the supported repair
□ Launch the same affected program
□ Confirm the original CONCRT140.DLL message is gone
□ If it remains, record the new exact error before continuing
Restart Windows after the supported repair, launch the same affected program, and repeat the action that produced the original message. If CONCRT140.DLL still fails, record the new exact error and stop before making unrelated system changes.
Safety warning: Do not copy or register CONCRT140.DLL in isolation. CONCRT140.DLL belongs to the Visual C++ Runtime family and this report does not identify it as a self-registering COM server. Repair it through Visual C++ v14 Redistributable instead of attempting manual registration.
The Visual C++ Concurrency Runtime component used by native applications that rely on parallel programming facilities.
CONCRT140.dll provides the Microsoft Concurrency Runtime used by some native C++ applications for task scheduling and parallel execution.
Use the official application or Microsoft package.
Match the affected program and x86 / x64 architecture before repairing.
Repair the application or Redistributable before using Windows system-file tools.
Capture the new wording and affected program. Do not continue repeating unrelated repairs.
This decision path is specific to Microsoft Concurrency Runtime Library. The Visual C++ Concurrency Runtime component used by native applications that rely on parallel programming facilities.
Note the affected program, the action that triggered the failure, and what changed immediately beforehand. Save open work and close that program normally; use Task Manager only if it is frozen or the supported repair tool says it is still running.
Record the exact message “CONCRT140.dll was not found” before closing it.Determine whether the reporting program is 32-bit or 64-bit before changing Visual C++ v14 Redistributable. A 64-bit edition of Windows can still run an x86 application, so Windows architecture alone does not identify the required runtime.
Dependency clue: msvcp140.dll — C++ runtime.Repair or reinstall the application that reports the error. Then install or repair the Microsoft runtime package required by that application. Use Repair or Change only when Windows or the official installer actually offers that option.
Use the official Visual C++ v14 Redistributable installer and retain its x86 / x64 packages when the affected software needs them.Restart Windows and retest before attempting system-file repair. Launch the same program and repeat the original action. If the wording changes, capture the new error and reassess instead of repeating unrelated repairs.
Validation target: The Visual C++ runtime package is absent.Page-specific safety boundary: CONCRT140.DLL must remain version-compatible with msvcp140.dll. Reset only after backing up application data, and reinstall solely from the program publisher or Microsoft.
Versions, hashes, and signatures can vary by supported package release. This report does not invent a universal "latest file" value. Confirm package selection against Latest supported Visual C++ Redistributable downloads (Microsoft Learn).
Distinct locally observed specimens are deduplicated by version, architecture, and SHA-256. A signature result identifies the inspected file; it is not a recommendation to copy a loose DLL into Windows.
Evidence method: file metadata read from the observed specimen, SHA-256 calculated by WinLab, and digital-signature status checked through Windows Authenticode. Observed 2026-08-31.
How we use AI: AI helps draft clear answers, but every published technical claim must be tied to an approved source, pass safety checks, and receive editorial review. It may not invent versions, hashes, signatures, download links, or success rates.
CONCRT140.dll provides the Microsoft Concurrency Runtime used by some native C++ applications for task scheduling and parallel execution.
The Visual C++ runtime package is absent; An application update left mixed runtime builds; The application installation is incomplete. For CONCRT140.DLL, confirm the owning Visual C++ v14 Redistributable installation before concluding that Windows itself is damaged.
Repair or reinstall the application that reports the error; Install or repair the Microsoft runtime package required by that application; Restart Windows and retest before attempting system-file repair. Repair the whole Visual C++ package so its companion libraries remain version-compatible.
Do not restore CONCRT140.DLL as an isolated download. Its supported owner is Visual C++ v14 Redistributable; use the affected application's installer or the matching Microsoft package so architecture, companion files, and servicing metadata remain consistent. Repair the whole Visual C++ package so its companion libraries remain version-compatible.
CONCRT140.DLL belongs to the Visual C++ Runtime family and this report does not identify it as a self-registering COM server. Repair it through Visual C++ v14 Redistributable instead of attempting manual registration.