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220-1102 Practice Question: A technician is troubleshooting a Windows 10 PC…
A technician is troubleshooting a Windows 10 PC that fails to boot with a 'Bootmgr is missing' error. They need to repair the boot configuration. Which administrative tool should be used from the Windows Recovery Environment (WinRE)?
⚠ Common exam trap
220-1202 often tests the specific bootrec command for BCD repair — candidates may confuse /rebuildbcd with /fixmbr or /fixboot, but /rebuildbcd is the correct choice for a missing or corrupted BCD store.
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
✓
Command Prompt to run bootrec /rebuildbcd.
The correct tool is Command Prompt to run 'bootrec /rebuildbcd' (B). The 'Bootmgr is missing' error indicates that the Boot Configuration Data (BCD) store is missing or corrupted. The 'bootrec /rebuildbcd' command scans for Windows installations and rebuilds the BCD, which is the appropriate repair step from WinRE.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
System Restore to revert to a previous restore point.
Why it's wrong here
System Restore primarily targets system files, registry settings, and installed applications, reverting them to a previous state. While it can resolve issues caused by recent software changes, it typically does not repair a severely corrupted or missing Boot Configuration Data (BCD) store or the boot manager itself, which are fundamental components required for the initial boot process. A corrupted BCD requires direct command-line repair.
- ✓
Command Prompt to run bootrec /rebuildbcd.
Why this is correct
When a Windows PC fails to boot due to a missing or corrupted `bootmgr` (Boot Manager) or Boot Configuration Data (BCD), accessing the Command Prompt in the Windows Recovery Environment (WinRE) is the correct approach. The `bootrec /rebuildbcd` command specifically scans for Windows installations on the disk and allows the user to add them to a newly created BCD store, effectively repairing the boot configuration and resolving critical boot errors like "bootmgr is missing."
- ✗
Device Manager to update the disk driver.
Why it's wrong here
Device Manager is a graphical utility within a running Windows operating system used for managing hardware devices and their drivers. It is not typically accessible or functional within the command-line focused Windows Recovery Environment (WinRE) when the operating system itself cannot boot. Furthermore, a "bootmgr is missing" error indicates a problem with the boot configuration or boot sector, not usually a faulty disk driver, which would manifest differently.
- ✗
Local Security Policy to adjust boot options.
Why it's wrong here
Local Security Policy (secpol.msc) is a management console used to configure security settings for a local computer, such as password policies, account lockout policies, and user rights assignments. It is part of the full Windows operating system and is completely inaccessible when the system fails to boot. Moreover, it has no functionality to directly manage or repair boot configuration data (BCD) or the boot manager, making it irrelevant for this issue.
Go deeper
Related to this question
Learn chapter
Windows Update Configuration
Key term
Recovery
Recovery is the process of restoring systems, data, and operations after a security incident, failure, or disaster to return to normal functioning.
Key term
Windows 10
Windows 10 is a personal computer operating system developed by Microsoft that combines the familiarity of Windows 7 with the modern features of Windows 8, designed to run on a wide range of devices from desktops to tablets.
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JA
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
This 220-1202 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 220-1202 exam.