Final answer:
To repair boot errors on a Windows 7 computer, the most suitable command from the options provided is 'CHKDSK /r', which checks for disk errors and attempts repairs.
Step-by-step explanation:
The question pertains to repairing a Windows 7 computer that is experiencing boot errors. There are a variety of tools available for diagnosing and repairing issues on a Windows 7 system. Among the options listed:
- CHKDSK /r: This command checks the disk for errors and attempts to repair any that it finds. It is a good command to use for issues related to the file system or hard drive.
- DEFRAG: This tool is used to defragment a hard disk which organizes files and free space more efficiently, but it is not useful for repairing boot errors.
- SCANDISK /repair: In earlier versions of Windows than Windows 7, SCANDISK was used to scan and repair disk errors, but it has been replaced by CHKDSK in more recent versions.
- DXDIAG: This is a diagnostic tool that provides information about the DirectX sound and video components of the computer, but it is not suitable for repairing boot errors.
The correct command for repairing boot errors in this list is CHKDSK /r. It checks the integrity of the file system and bad sectors on the hard drive and attempts to repair any issues it might find.