My Windows 10 PC started running slow, and File Explorer sometimes freezes when I open my hard drive. I’m worried the drive may have errors or bad sectors, but I’m not sure which Windows tools are safe to use or if I should back up everything first. What’s the best way to check and repair a hard drive in Windows 10?
Yes, you can sometimes fix a hard drive in Windows 10, but don’t start with CHKDSK or formatting if the drive has files you care about. Those tools can help, but they also write changes to the disk. If the file system is already damaged, that can make recovery harder.
The safer order is: get the important data off first, then try to repair the drive.
What you can fix depends on the type of problem. If it’s a logical issue, like a broken file system, a RAW partition, or corruption after a crash or bad shutdown, Windows tools may be enough. If the drive is clicking, dropping in and out, showing tons of bad sectors, or not staying connected, that’s probably hardware failure. Windows can’t repair that.
First, see how the drive shows up
Open Disk Management with Win + X → Disk Management.
Look for a few things:
- whether the drive shows the correct size,
- whether Windows asks you to format it,
- whether the partition shows as RAW,
- whether the drive appears at all.
If Windows still sees the correct capacity, that’s usually a decent sign. It means the system can still talk to the drive, even if the file system is messed up.
Copy or recover the files before fixing anything
If there’s anything important on the drive, recover it before running repair commands.
For Windows 10, Disk Drill is a practical option because it can make a full image of the drive and then scan that image instead of hammering the original disk over and over. That matters if the drive is unstable or starting to fail.
A basic workflow would be:
- Install Disk Drill somewhere else, not on the damaged drive.
- Create an image of the problem drive.
- Open that image in Disk Drill.
- Run Universal Scan.
- Preview the files it finds.
- Recover the files to a different drive.
The preview part is useful because you can check whether the files are actually readable before spending time recovering them. The free Windows version lets you recover up to 100 MB, which is enough to test it or save a few small but important files.
Then try repairing it
Once the data is safe, you can start trying repairs.
CHKDSK
If the drive still has a readable file system, open Command Prompt as Administrator and run:
chkdsk X: /r
Replace X with the correct drive letter.
This checks the file system, fixes logical errors, and tries to recover readable data from bad sectors. Just don’t treat it as a recovery tool. It changes the file system, so it’s better to run it after you’ve saved what matters.
TestDisk
If the drive turned RAW or the partition table is damaged, TestDisk may be a better fit. In some cases it can restore the partition without formatting the drive.
SFC and DISM
If the issue is with your Windows 10 system drive after a failed update, crash, or system corruption, try SFC and DISM too. They don’t really repair the physical drive. They repair Windows files and the Windows component store, so they’re more useful when Windows itself is unstable.
Format
If recovery is done and the drive still won’t behave, formatting is usually the cleanest fix for logical corruption. A quick format creates a new file system. If the same drive corrupts again after that, I’d stop trusting it.
When to stop repairing and replace it
Replace the drive if you’re seeing things like:
- clicking or grinding,
- random disconnects,
- the drive disappearing from Disk Management,
- bad sectors increasing over time,
- corruption coming back after repairs.
That usually points to physical deterioration, not a one-time Windows problem.
If the drive is physically failing and the files are valuable, don’t keep experimenting with it. A professional recovery lab is the better route. They can clone the failing drive with specialized equipment and work from that copy. Many reputable labs also use a “no data, no fee” policy, so you generally only pay if they recover something.
So yes, Windows 10 can repair some hard drive problems. Just do it in the right order: recover your files first, then repair the drive. That gives you the best chance of fixing the issue without turning recoverable data into lost data.
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Freezing File Explorer does not automatically mean the drive can be “repaired.” It can be a bad drive, but it can also be a bad SATA/USB cable, a dying external enclosure, Windows trying to thumbnail a damaged folder, or Explorer hanging while it waits for a slow disk response.
Before running repair commands, I’d check the drive’s health data. Use something like CrystalDiskInfo or the manufacturer’s diagnostic tool and look at SMART warnings, especially reallocated sectors, pending sectors, uncorrectable errors, and overall health status. If those are bad or getting worse, don’t waste time trying to “fix” the drive with Windows. Copy what you can, image it if needed, and replace it. CHKDSK can tidy up a damaged file system, but it cannot make failing media healthy again.
If it’s an external drive, try a different cable and USB port first. If it’s an internal drive, reseating or replacing the SATA cable is cheap and sometimes solves weird freezes. After your data is safe, then run chkdsk X: /f first. I would not jump straight to /r unless you’re prepared to wait a long time and accept that it will stress the disk by reading the whole surface. If files matter, a recovery/image-first approach like the Disk Drill workflow mentioned above makes more sense than repeatedly poking the same unstable drive from Windows Explorer.
A drive that freezes Explorer only when you open one folder is a different problem than a drive that stalls the whole PC whenever it spins up. Before treating it like a repair job, I’d try to separate “Explorer is choking” from “the disk is choking”: turn off thumbnails, try opening the drive from Command Prompt, and check Event Viewer under Windows Logs > System for Disk, Ntfs, or storahci warnings. If the freezes line up with disk errors there, I’d stop browsing the drive normally and copy/image the important stuff first, like the others said. If there are no disk warnings and it’s just one folder full of media files, you may be dealing with a bad file, preview handler, or thumbnail cache rather than a dying drive. Windows can fix file system damage with CHKDSK, but it can’t turn a mechanically unreliable drive back into one I’d trust.
Whether this is your C: drive or a separate data drive changes the advice a lot.
If it’s a secondary drive, stop opening it in File Explorer for now. Explorer is a terrible diagnostic tool because it tries to read icons, thumbnails, metadata, folder history, and sometimes preview info before you even touch the files. A half-failing disk can look “worse” in Explorer than it does from a simple copy command. If you can, copy the important folders from Command Prompt or PowerShell to another disk instead of clicking around through the drive.
For a cheap first pass, I’d try copying the must-have files before doing any repair:
robocopy X:\ImportantFolder D:\Recovered\ImportantFolder /E /R:1 /W:1
Change the drive letters and folder names, of course. The /R:1 /W:1 part keeps it from retrying forever on a bad file. That will not recover everything from a damaged disk, but it can get readable files off without you babysitting Explorer while it hangs on one thumbnail or corrupt video.
If it’s your Windows drive, I’d be more cautious. Don’t spend hours “repairing” the same disk you’re actively booted from if it is stalling the whole machine. That means Windows, paging, antivirus, indexing, updates, and your repair tool may all be hitting the drive at the same time. In that case, the better move is to boot from another drive, a recovery USB, or attach the disk to another PC and copy/image it from there. Disk Drill or another imaging/recovery tool can make sense when normal copying keeps failing, but if the files are visible and copy cleanly, plain copying is faster and free.
After the data is safe, then yes, Windows 10 can repair some problems. chkdsk /f is the normal “fix the file system” command. /r is heavier because it scans the surface and can take a long time on a large drive. I would not use /r as the first button to press on a drive that already acts sick. It is more of a “I have a backup and want to test/clean this volume” step, not a magic health restore.
And don’t confuse “Windows fixed errors” with “the drive is trustworthy again.” If SMART shows pending sectors, reallocated sectors, uncorrectable errors, or the same corruption returns after formatting, retire the drive. For an SSD, check the SSD health tool from the manufacturer too, because bad blocks and wear are handled differently than old spinning hard drives. Repairing the file system may make Windows usable again, but it does not reset the clock on failing hardware.