A MSVCR100.DLL-specific sequence based on Visual C++ 2010 Runtime and its supported delivery through Visual C++ 2010 Redistributable.
Use the affected application's original installer or support package.
Record the affected program, exact MSVCR100.DLL message, Windows version, and whether the app is 32-bit or 64-bit.
Use the affected application's original installer or support package.
Use the affected application's official installer or prerequisite package. For legacy Visual C++ packages, open Control Panel > Programs > Programs and Features, select the matching Redistributable generation, and choose Change or Repair when offered. Do not substitute a newer runtime generation.
□ Restart Windows after the supported repair
□ Launch the same affected program
□ Confirm the original MSVCR100.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 MSVCR100.DLL still fails, record the new exact error and stop before making unrelated system changes.
Safety warning: Do not copy or register MSVCR100.DLL in isolation. MSVCR100.DLL belongs to the Visual C++ 2010 Runtime family and this report does not identify it as a self-registering COM server. Repair it through Visual C++ 2010 Redistributable instead of attempting manual registration.
The Microsoft C runtime paired with software built using the Visual Studio 2010 toolset.
MSVCR100.dll implements the Microsoft C Runtime used by Visual Studio 2010 applications.
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 Visual C++ 2010 C Runtime Library. The Microsoft C runtime paired with software built using the Visual Studio 2010 toolset.
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 “MSVCR100.dll was not found” before closing it.Check the program's documented prerequisites or original installer. MSVCR100.DLL belongs to Visual C++ 2010 Runtime; installing a newer Visual C++ or DirectX generation does not automatically satisfy this side-by-side dependency.
Expected delivery context: Official package; do not rename a newer DLL to MSVCR100.DLL.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++ 2010 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 2010 runtime was never installed.Page-specific safety boundary: MSVCR100.DLL must remain version-compatible with msvcp100.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.
MSVCR100.dll implements the Microsoft C Runtime used by Visual Studio 2010 applications.
The 2010 runtime was never installed; The package was damaged or removed; A 32-bit application cannot find its x86 dependency. For MSVCR100.DLL, confirm the owning Visual C++ 2010 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. Do not replace it with MSVCR110.dll or MSVCR120.dll; those are different runtime generations.
Do not restore MSVCR100.DLL as an isolated download. Its supported owner is Visual C++ 2010 Redistributable; use the affected application's installer or the matching Microsoft package so architecture, companion files, and servicing metadata remain consistent. Do not replace it with MSVCR110.dll or MSVCR120.dll; those are different runtime generations.
MSVCR100.DLL belongs to the Visual C++ 2010 Runtime family and this report does not identify it as a self-registering COM server. Repair it through Visual C++ 2010 Redistributable instead of attempting manual registration.