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How to Repair A Bad Sector in Windows 10/8/7

Updated on Apr 23, 2019 by Brithny to Disk/Partition Clone

What is the best way to fix or repair bad sectors on the hard disk in Windows 10/8/7? This page offers you the best solutions to fix bad sectors issue and shows you how to replace a disk with bad sectors.
Part 1. Check the Bad Sectors on Your Hard Drive
Part 2. Replace the Disk with a Good/Bigger One

What to do when a hard disk has a bad sector problem in Windows 10/8/7? Occasionally, when one or more bad sectors come upon on a good hard disk, the disk will go bad. When this happens, the data in those bad sectors may be lost, but the data on the rest of the disk will be unaffected and the disk is still completely usable. Those bad sectors cannot be repaired, but they can be marked as unusable. Once marked as unusable, the Operating System will know not to attempt to store data in those bad sectors. The total disk capacity will be decreased by the amount of storage space in those bad sectors. If the bad sector was caused by a faulty drive head, the problem can spread to many other sectors across the disk.

So, if your hard drive is experiencing one or more bad sectors, follow our instruction to fix your problem as soon as possible.

Part 1. Check the Bad Sectors on Your Hard Drive

To know about the amount of the bad sectors clearly, a professional tool is recommended. EaseUS Partition Master can directly help you check the bad sectors from the hard disk in Windows 10/8/7 with simple clicks and you may download it and follow the steps below to try now.

Step 1: Download the free partition manager and install it. Right-click the disk that you want to check, and then click "Surface test".

Step 2: The operation will be immediately performed. Bad sectors will be marked as red.

wait for the process to check your sectors

After the process, you could know exactly how many bad sectors are there. You cannot repair bad sectors except for low-level format. A low-level format is also called a physical format. Modern hard drives are low-level formatted at the factory for the life of the drive. A PC cannot perform an LLF on a modern IDE/ATA or SCSI hard disk, and doing so would destroy the hard disk. That is to say, you can't repair a bad sector. To avoid the hard disk getting worse, clone the disk to a good one.

If there are too many bad sectors, the scanning process will be stuck. If the error is serious, the abnormal noise will obviously be heard during the operation, and basically, Part 2 will not work. What can be cloned is still a case where the error is not serious.

Part 2. Replace the Disk with a Good/Bigger One

If the disk is damaged, it is impossible to repair the bad sectors. Your wise choice is to replace the disk. Here we’d like to recommend you try a powerful disk cloning software - EaseUS Disk Copy which is fully compatible with all OS. You can just apply this software to help you upgrade and clone the hard drive with bad sectors to a good one with ease now.


EaseUS Disk Copy

Replace the Disk with a Good one


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Note: Do remember to connect your good new hard drive to the computer as a storage device before upgrading the disk with bad sectors to the good one.

If your computer can't boot into your operating system, you must download this software and create a bootable USB. Then you can follow the steps below:

Step 1: Choose "Disk mode" and select the smaller hard drive as the source disk.

select the hard drive that you want to clone

Step 2: Choose the bigger hard drive to save the data and then click "Next".

select the destination disk - the bigger one

Step 3: A warning message tells you that the data on the destination disk will be overwritten. Click “OK” to continue if you do not have important data on the destination disk.

confirm the message

Step 4: Edit the disk layout and then click "Proceed" to continue.

  • "Autofit the disk" resize the layout on destination disk according to the size of it to make the disk as the best status.
  • "Copy as the source" doesn’t change anything on destination disk and the layout is same as source disk.
  • "Edit disk layout" allows you to manually resize/move partition layout on this destination disk.
check the diak layout

Step 5: Wait for the process to complete.

wait for the process to end

And then shut down your computer, insert the newly upgrade hard drive to your computer and replace the old drive, set the computer to boot from a new hard drive instead of the old one in BIOS.