Courseiva
← FC0-U71
Full test
easyMultiple Choice

Missing DLL or Runtime Library Error

Exhibit

Refer to the exhibit.
```
Error: The program cannot start because MSVCR100.dll is missing from your computer. Try reinstalling the program to fix this problem.
```

A user attempts to run a legacy application and receives the error message shown in the exhibit. What is the most likely cause of this error?

Quick Answer

The correct answer is that the required Microsoft Visual C++ redistributable package is not installed. This is because legacy applications often depend on specific runtime libraries, such as MSVCR100.dll or MSVCR120.dll, which are provided by the Visual C++ Redistributable; when this package is missing, the system cannot locate the necessary DLL, triggering a "missing DLL or runtime library after installation" error. On the CompTIA ITF+ FC0-U61 exam, this scenario tests your understanding of application dependencies and system requirements, often appearing as a common trap where students mistakenly blame a corrupt file or incorrect Windows version instead of the missing redistributable. A helpful memory tip is to think of the "C++ Redist" as the library card for your program—without it, the program can't check out the books (DLLs) it needs to run.

⚠ Common exam trap

Test-takers frequently assume the error is due to a missing application file or permission issue, rather than recognizing the specific symptom of a missing Visual C++ runtime library, which is a common dependency error in legacy Windows applications.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The required Microsoft Visual C++ redistributable package is not installed.

The error message typically indicates that the application requires a specific version of the Microsoft Visual C++ Redistributable package, which provides essential runtime libraries (e.g., MSVCR100.dll, MSVCR120.dll) that legacy applications depend on. Without these libraries, the application cannot load critical components and fails with a system-level error, such as 'The program can't start because MSVCR*.dll is missing'.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    The application is not installed correctly.

    Why it's wrong here

    A faulty installation typically produces missing-DLL or path errors, not the exhibit's specific message; the application launches far enough to report it. Reinstalling is tempting because corrupt installs do cause launch failures, and it would be the right fix if files or registry entries were genuinely absent or damaged.

  • ✗

    The user does not have permission to run the application.

    Why it's wrong here

    A permissions error typically presents as access denied when launching the executable, not as the compatibility or missing-component message shown. Permissions are tempting because they are a common cause of launch failures, but the exhibit's specific error points to an incompatible or missing runtime component instead.

  • ✗

    Antivirus software has quarantined the application file.

    Why it's wrong here

    Quarantined files usually vanish or trigger a security alert, not the exhibit's error; the executable still runs. Quarantine is tempting because antivirus blocking does stop legacy apps, and it would be correct if the file were flagged as malware and moved to the vault.

  • ✓

    The required Microsoft Visual C++ redistributable package is not installed.

    Why this is correct

    Legacy applications built with Visual C++ link dynamically against runtime DLLs such as msvcp and vcruntime. When those libraries are absent, the loader fails with a missing-DLL error, resolved by installing the matching Microsoft Visual C++ redistributable package.

About these practice questions

This FC0-U71 question is part of Courseiva's 988-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Same concept, more angles

1 more way this is tested on FC0-U71

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. A user installed a new photo editing application. After opening it, the user receives an error that the application cannot find a required DLL file. Which of the following is the MOST likely cause?

easy
  • ✓ A.The application did not install all necessary components.
  • B.The application configuration file is corrupted.
  • C.The computer does not have enough RAM to run the application.
  • D.The graphics driver is outdated.

Why A: A DLL (Dynamic Link Library) file is a shared code library that applications call at runtime. If the application installer did not copy all required DLLs to the system (e.g., missing Visual C++ Redistributable or a specific runtime component), the application will fail with a 'DLL not found' error. This is the most common cause because the installation process was incomplete or corrupted, not because of hardware or driver issues.

JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.