FC0-U71 Applications and Software Practice Question
A technician is preparing a Windows workstation for a user who needs to run a legacy line-of-business program that requires specific runtime libraries and direct access to a hardware security key. The technician must choose installation and configuration steps that support these requirements. Which TWO actions are appropriate? (Choose two.)
⚠ Common exam trap
The trap here is treating compatibility mode as a cure-all for legacy software when the real blockers are missing runtime libraries and missing hardware driver support.
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
✓
Install the required runtime libraries before launching the legacy application.
The legacy program requires specific runtime libraries and access to a hardware security key. Installing the runtime libraries first ensures the application can load, and installing the key's driver and middleware enables the application to communicate with the hardware. Compatibility mode, disabling User Account Control, and changing the file system do not meet those two specific requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure the application to run in compatibility mode for an older version of Windows.
Why it's wrong here
Compatibility mode adjusts how Windows reports its version and handles certain behaviors, which can help some older programs. However, it does not install missing runtime libraries, and it does not grant access to a hardware security key. In this scenario the program specifically needs runtime libraries and hardware key access, so compatibility mode alone does not satisfy the requirements.
- ✗
Convert the system drive to a different file system before installing the application.
Why it's wrong here
Changing the file system on the system drive is a major operation that does not address missing runtime libraries or hardware key access. Modern Windows installations already use a file system that supports the needed features. This step adds risk and downtime without solving either of the stated requirements, so it is not appropriate here.
- ✗
Disable User Account Control for all users on the workstation.
Why it's wrong here
Disabling User Account Control reduces the protection that warns about or blocks unauthorized changes. It does not provide runtime libraries or security key access, and it weakens the workstation's security posture. The scenario's requirements can be met without removing this safeguard, so this action is unnecessary and harmful.
- ✓
Install the required runtime libraries before launching the legacy application.
Why this is correct
Legacy applications often depend on specific runtime libraries, such as particular versions of a framework or runtime, that are not present on a modern default Windows installation. Installing those libraries first ensures the program can load its dependencies and start correctly. This is a direct, necessary step to meet the stated requirement for specific runtime libraries.
- ✓
Install the driver and middleware required for the hardware security key.
Why this is correct
A hardware security key needs a compatible driver and often vendor middleware so the operating system and application can communicate with it. Without these components, the legacy program cannot use the key for authentication or licensing. Installing the driver and middleware directly addresses the requirement for direct access to the hardware security key.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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