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Disk repair

Check and repair a Windows disk safely.

Updated

To check a Windows disk, run chkdsk C: from an administrator Command Prompt. Use chkdsk C: /f only when you intend to repair filesystem errors; the system drive may require a restart. Back up important data before repairs.

Start with the least disruptive check

chkdsk C:
chkdsk C: /scan

Without repair parameters, CHKDSK reports status. The online /scan option scans an NTFS volume while Windows is running.

Repair options

chkdsk C: /f
chkdsk C: /r
  • /f fixes logical filesystem errors and may schedule work for the next restart when the volume is in use.
  • /r includes /f, locates bad sectors and attempts readable-data recovery. It can take much longer.
Before repair: back up important data. A disk showing physical failure symptoms needs a replacement plan, not repeated repair scans.

With Screensie

PCInfo lists drives and provides a confirmed CHKDSK scan with real progress, cancellation and returned results. A repair that requires exclusive access or restart should be coordinated with the owner.

Reference: Microsoft CHKDSK documentation.

Common questions

Does CHKDSK repair a disk automatically?

Running chkdsk C: reports filesystem status. The /f option requests filesystem repairs, while /r adds a much longer bad-sector check. Back up important files and confirm the intended volume before requesting repairs.

Why does CHKDSK ask for a restart?

Windows may need to schedule a repair when it cannot lock a volume in use, including the system drive. Read the prompt, save work, and arrange the restart before continuing.

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