easyMultiple Choice
220-1202 Practice Question: A customer complains that their Windows 10 PC…
A customer complains that their Windows 10 PC fails to boot and displays a 'Bootmgr is missing' error. You suspect the Boot Configuration Data (BCD) is corrupted. Which tool should you use to repair the BCD from the Windows Recovery Environment?
⚠ Common exam trap
220-1202 often tests the confusion between boot repair tools — candidates may select sfc or chkdsk for boot issues when the specific error points to BCD corruption requiring bootrec /rebuildbcd.
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
✓
bootrec /rebuildbcd
The 'Bootmgr is missing' error indicates that the Windows Boot Manager cannot locate or read the Boot Configuration Data (BCD) store. The bootrec /rebuildbcd command, run from the Windows Recovery Environment, scans the disk for Windows installations and rebuilds the BCD store, restoring the boot configuration. This is the correct tool for repairing a corrupted BCD.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
chkdsk /f
Why it's wrong here
The chkdsk /f command is primarily used to scan and repair logical file system errors on a specified volume, such as corrupted entries in the Master File Table (MFT) or lost clusters. While crucial for maintaining data integrity and resolving issues like bad sectors, it operates at the file system level and does not address problems with the Boot Configuration Data (BCD) store itself, which is a separate component of the boot process.
- ✗
sfc /scannow
Why it's wrong here
The System File Checker (sfc /scannow) command is designed to scan all protected operating system files for corruption and replace any incorrect versions with correct Microsoft versions from the Windows Component Store. This utility is vital for resolving issues with core Windows system files, DLLs, and executables. However, it does not specifically target or repair corruption within the Boot Configuration Data (BCD), which manages boot options and parameters.
- ✓
bootrec /rebuildbcd
Why this is correct
The bootrec /rebuildbcd command is specifically designed to scan all hard drives for compatible Windows installations and then reconstruct the Boot Configuration Data (BCD) store. This process effectively creates a new BCD store, incorporating any found Windows operating systems, which is critical for resolving boot failures caused by a corrupted or missing BCD. It directly addresses the boot configuration, enabling the Windows Boot Manager to locate and load the operating system.
- ✗
diskpart
Why it's wrong here
The diskpart utility is a command-line tool for managing disk partitions, volumes, and virtual hard disks, allowing users to create, delete, format, and assign drive letters. It operates at a fundamental level of disk organization, manipulating the physical and logical structure of storage devices. While essential for preparing disks for use or troubleshooting storage issues, diskpart does not possess the functionality to repair or rebuild the Boot Configuration Data (BCD) store.
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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
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