How to run CHKDSK on Windows 10 from CMD or before boot

CHKDSK is a command we use at the command prompt to scan, verify, and repair hard drives on our computers. In Windows 10, use chkdsk it is no different from using it in older versions of Windows. However, you will need to grant administrative privileges to the command prompt (CMD) for the chkdsk command to work.

How to run CHKDSK in Windows 10 from command prompt

If your target hard drive is not a bootable drive, meaning the drive is not where your Windows is, using chkdsk at the command prompt will scan and repair the target drive immediately.

  1. Go to the start menu. Scribe CMD .
  2. From the result, right-click on Symbol of the system , then click Execute as an administrator .
  3. If “User Account Control” asks for permission, click Yes to continue.
  4. At the command prompt, type:
    chkdsk [driveletter] / f / r / x
  5. For instance:
    chkdsk C: / f / r / x

  6. Chkdsk will run to scan the selected disk for errors and repair them automatically. It can take hours if you have a huge, messy drive.

What do we need for the “/ f / r / x” parameters when we do chkdsk?

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Well, if you enter chkdsk, the command will just scan the disk and show you the disk status. It will not repair anything without the parameters.

  • To allow you to correct the errors you find, you need » / f «.
  • If you want it to also locate bad sectors on the drive and recover readable information, you need » / r «.
  • To force you to unmount the drive before you start verifying the disk, you need » / x «. This is recommended to ensure that there is no application running on that particular drive that could interfere with the chkdsk process.
  • If you need more information on other parameters that you can use, go to this chkdsk document from microsoft.

How to run CHKDSK on Windows 10 before boot

If you want to chkdsk your main drive where you store and boot your Windows, usually C: drive, chkdsk will need to be run before booting into Windows. This is because chkdsk cannot be run if the drive is in use, especially if there are some central system files that Windows relies on to work.

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So, this is how you can configure chkdsk to run before boot in Windows 10:

  1. Follow steps 1-4 in the instructions above.
  2. At the command prompt, enter the chkdsk commands with the parameters. For instance:
    chkdsk C: / f / r / x
  3. If chkdsk detects that the drive you want to scan is a bootable drive, it will display » The current drive cannot be locked. Chkdsk cannot be run because the volume is being used by another process «, And ask if you want to schedule the drive check the next time you restart / restart your computer.
  4. Type and between AND .
  5. Restart your computer.
  6. Chkdsk will run automatically during your next boot before booting into Windows.

Yes chkdsk does not run on next reboot , repeat the previous step through step 4 before entering the chkdsk command. Enter » CD ” (without quotation marks). This allows cmd to return to the root directory before executing any command. Then you can enter the chkdsk command.

When do you need to run chkdsk for your drives?

Little by little and as often as you like. Chkdsk, unlike defragmentation, will not harm your drive in any way, no matter how often you run it. If you haven’t been running in a while, run it now. It is recommended to run chkdsk for each hard drive once a month.

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If you find crashes, crashes, drives, or CPUs running 100% all the time in Windows 10, run chkdsk. It may be disk errors that cause all the problems.

Why is chkdsk stuck at a certain percentage for a long time?

Chkdsk takes a while to finish. We are talking about several hours here, depending on the size of the disk and how much space was used. Try to wait for it. Usually we let our chkdsk system run overnight.

If chkdsk is still stuck at a certain percentage even after 10 hours of running, try restarting the run. It may indicate that your unit is starting to fail. Make a backup right away and replace a new drive ASAP before it breaks completely.

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