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Table of Contents
Method 1 of 2:
On Windows
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Images 1 of How to Repair Bad Sectors Connect the drive to your computer if necessary. If you're trying to repair a malfunctioning external hard drive or flash drive, plug it into one of your computer's USB ports.- Skip this step if you're attempting to fix a built-in hard drive.
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Images 2 of How to Repair Bad Sectors Open Start. Click the Windows logo in the bottom-left corner of the screen. You can also press the ⊞ Win key to open Start.
Images 3 of How to Repair Bad Sectors -
Images 4 of How to Repair Bad Sectors Open File Explorer. Click the folder-shaped icon on the left side of the Start window. This will open the File Explorer window.
Images 5 of How to Repair Bad Sectors -
Images 6 of How to Repair Bad Sectors Click This PC. It's a folder on the left side of the File Explorer window. Doing so opens the This PC window. -
Images 7 of How to Repair Bad Sectors Select a hard drive. Beneath the "Devices and drives" heading, click the hard drive that you want to repair.- Generally, the computer's built-in hard drive is labeled OS (C:).
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Images 8 of How to Repair Bad Sectors Click the Computer tab. It's in the top-left corner of the window. A toolbar will appear. -
Images 9 of How to Repair Bad Sectors Click Properties. This red checkmark icon is in the far-left side of the toolbar. Doing so opens the Properties window. -
Images 10 of How to Repair Bad Sectors Click the Tools tab. It's at the top of the window. -
Images 11 of How to Repair Bad Sectors Click Check. This option is on the far-right side of the "Error checking" section near the top of the Properties window.[1] -
Images 12 of How to Repair Bad Sectors Click Scan drive when prompted. Your computer will begin scanning for bad sectors. -
Images 13 of How to Repair Bad Sectors Wait for the scan to complete. Once the scan completes, a pop-up with the results will appear. -
Images 14 of How to Repair Bad Sectors Click Scan and repair drive when prompted. It's at the bottom of the pop-up. This will prompt Windows to attempt to fix the disk errors, which can mean anything from reformatting the bad sectors to moving the bad sectors' files onto new, uncorrupted sectors.- You may have to click Scan and repair drive several times to resolve all errors.
Method 2 of 2:
On Mac
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Images 15 of How to Repair Bad Sectors Connect the drive to your computer if necessary. If you're trying to repair a malfunctioning external hard drive or flash drive, plug it into one of your computer's USB ports.- Skip this step if you're attempting to fix a built-in hard drive.
- You may need a USB 3 to USB-C adapter if your Mac doesn't have traditional USB ports.
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Images 16 of How to Repair Bad Sectors Click Go. It's a menu item at the top of your Mac's screen. A drop-down menu will appear.- If you don't see Go at the top of the screen, click the Finder app icon in your Mac's dock (or click the desktop) to force it to appear.
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Images 17 of How to Repair Bad Sectors Click Utilities. You'll find this option near the bottom of the drop-down menu. -
Images 18 of How to Repair Bad Sectors Open Disk Utility. Double-click the Disk Utility app icon, which resembles a grey hard drive with a stethoscope on it. -
Images 19 of How to Repair Bad Sectors Select a hard drive. In the upper-left corner of the window, click the hard drive that you want to fix. -
Images 20 of How to Repair Bad Sectors Click the First Aid tab. It's an image of a stethoscope at the top of the Disk Utility window. -
Images 21 of How to Repair Bad Sectors Click Run when prompted. Doing so will prompt Disk Utility to begin scanning (and repairing) your selected hard drive's bad sectors. -
Images 22 of How to Repair Bad Sectors Wait for the repairs to complete. Once the Disk Utility finishes repairing your drive, you should see a pop-up explaining what was repaired.- If you don't see any repairs listed, your hard drive doesn't have any bad sectors to repair.
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Images 23 of How to Repair Bad Sectors Run Disk Utility again. For each time that a repair (or series of repairs) is listed, run Disk Utility again to scan for further issues. Once Disk Utility no longer reports repairs upon completing the scan, your Mac's hard drive is fixed.[2]
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