A Windows user is experiencing frequent application crashes and system instability. A technician suspects operating system file corruption. Which of the following commands should the technician run to scan for and attempt to repair corrupted system files?
format c:
sfc /scannow
chkdsk /r
dism /online /cleanup-image /restorehealth
The correct answer is sfc /scannow. The System File Checker (SFC) tool, when run with the /scannow switch, scans all protected system files for corruption and replaces incorrect, corrupted, changed, or damaged versions with correct versions where possible. chkdsk /r is a command used to check a disk for errors and locate bad sectors to recover readable information. dism /online /cleanup-image /restorehealth is used to repair the Windows component store image, which sfc uses for its repairs, and is typically run if sfc /scannow fails. format c: is a destructive command that would erase the entire C: drive and is not a repair tool.
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