How to Run CHKDSK in Windows 10 Before Boot

CHKDSK is a built-in command-line tool that checks and repairs the disk on your computer. CHKDSK (Check Disk Command) examines FAT16, FAT32, and NTFS drives and can fix various types of errors. This guide will show you how to run the CHKDSK command in Windows 10 before Boot or after Boot.

Check Disk command locates the errors by comparing the volume bitmap with the disk sectors assigned to files in the file system. The volume bitmap is a particular file that keeping track of the used and unused disk sectors. However, the Check Disk command can not repair the corrupted files’ data because files’ data are structurally intact.

How to Run CHKDSK command Before Boot

Suppose you want to run the CHKDSK command to examine the boot drive where Windows OS is installed. In that case, you will need to run the check disk command before booting into Windows because when the disk is in use, the Check Disk command will not run and prompt a message that asks whether you want to schedule the disk to be checked the next time you restart the system.

You can run the CHKDSK command and schedule to check the disk the next time when the computer restarts. Follow the step below to run the command.

  1. Click the Start Menu button, and search the “Command Prompt”.
  2. Right-click the command prompt in the search result, and select Run as administrator.
  3. This will run the command prompt with Admin privileges.
  4. In the command prompt, run the following commands respectively.

Navigate to C drive:

command: cd\

Run the Check Disk command:

command: chkdsk c:

Check Disk command will perform an complete analysis of the C drive and return a status message regrading any problems if it find. It would not fix the errors until you specify the /f option in the command.

command: chkdsk c: /f /r /x
  • /f – To fix the errors
  • /r – Locate bad disk sectors and recovers readable information
  • /x – Force the volume to dismount first
  1. When you run the command, a message will display that asks “Would you like to schedule this volume to be checked that next time the system restarts?
  2. Type “Y”, then hit the enter button to confirm.
How to Run CHKDSK in Windows 10 Before Boot
  1. Restart the computer.
  2. CHKDSK will automatically run during the boot.

How to Run CHKDSK command After Boot

If you want to examine other drives such as D, F, and G drives. Then, you can immediately run the Check Disk command; this command will check the integrity of the disk and fix the errors if it encounters.

Follow the steps below to run the Check Disk command.

  1. Click the Start Menu button, and search the “Command Prompt”.
  2. Right-click the command prompt in the search result, and select Run as administrator.
  3. This will run the command prompt with Admin privileges.
  4. In the command prompt, type the following command, then hit Enter button to execute the command.
command: chkdsk [driveletter] /f /r/ x

Replace the “driveletter” with the later of the Drive you want examine. For example I want scan D drive, then command looks like chkdsk D: /f /r /x.

  1. As soon as you run the command, the process will start and complete in a while.

You should periodically use the Check Disk tool (CHKDSK command) to check the integrity of the disks. This command performs the scan on the hard drive and fixes various errors.

First, you should run the command without any options such as “/f /r /x”. Once the command is completed, you can check if any errors occur on the disk, then perform a fix.

I hope, this guide is helpful for you. If you have any question, feel free to comment below.

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