If you want chkdsk to correct disk errors, you can't have open files on the drive. If files are open, the following error message appears:. If you choose to check the drive the next time you restart the computer, chkdsk checks the drive and corrects errors automatically when you restart the computer.
If the drive partition is a boot partition, chkdsk automatically restarts the computer after it checks the drive. Use the fsutil dirty set command to set the volume's dirty bit indicating corruption , so that Windows runs chkdsk when the computer is restarted.
Chkdsk examines disk space and disk use and provides a status report specific to each file system. The status report shows errors found in the file system. Chkdsk must be able to lock the drive to correct errors. Because repairs on FAT file systems usually change a disk's file allocation table and sometimes cause a loss of data, chkdsk might display a confirmation message similar to the following:. When chkdsk finishes, you can check these files to see if they contain any data you need. If you press N , Windows fixes the disk, but it does not save the contents of the lost allocation units.
This could happen if open files have not yet been recorded in the file allocation table. If chkdsk reports the loss of a large number of allocation units, consider repairing the disk.
Because the Shadow Copies for Shared Folders source volume cannot be locked while Shadow Copies for Shared Folders is enabled, running chkdsk against the source volume might report false errors or cause chkdsk to unexpectedly quit. You can, however, check shadow copies for errors by running chkdsk in Read-only mode without parameters to check the Shadow Copies for Shared Folders storage volume. The chkdsk command, with different parameters, is available from the Recovery Console.
On servers that are infrequently restarted, you may want to use the chkntfs or the fsutil dirty query commands to determine whether the volume's dirty bit is already set before running chkdsk. The following table lists the exit codes that chkdsk reports after it has finished.
If it encounters errors, chkdsk pauses and displays messages. Chkdsk finishes by displaying a report that lists the status of the disk. You cannot open any files on the specified drive until chkdsk finishes. Any time you have hard drive errors—or even strange behavior you might not at first associate with a hard drive—Check Disk can be a lifesaver. We recommend running chkdsk every few months as part of routine maintenance along with using a S.
You should also consider running it any time Windows has shut down abnormally—such as after a power loss or system crash. For example: I once had a problem where Outlook suddenly started crashing on me shortly after loading.
After a lot of troubleshooting, a chkdsk scan revealed I had bad sectors where my Outlook data file was stored. Fortunately, chkdsk was able to recover the sectors in my case, and everything went back to normal afterward. For that reason, you should always make sure you have a good backup routine in place and back up your PC before running chkdsk. The chkdsk tool works pretty much the same in all versions of Windows.
Running the Check Disk tool from the Windows desktop is easy. If the quick disk scan reveals any problems, Windows will present that option to you. This serves as indication that Windows will run a check the next time it starts. This command actually excludes the drive from the chkdsk command for the next start. If you do restart to find that a scan has been scheduled, Windows is also kind enough to provide you with about ten seconds to skip the scan if you want to.
If you just use the chkdsk command by itself, it will scan your drive in read-only mode, reporting errors but not attempting to repair them. For this reason, it can usually run without having to restart your PC. There are, of course, other parameters you can use with chkdsk. So, for the sake of completeness—and your geeky enjoyment—here they are:. Hopefully, Chkdsk will fix whatever hard drive problems you may have, and you can go back to using your computer normally. Browse All iPhone Articles Browse All Mac Articles Do I need one?
Browse All Android Articles Browse All Smart Home Articles Customize the Taskbar in Windows Browse All Microsoft Office Articles What Is svchost. Browse All Privacy and Security Articles The chkdsk command will search the disk drive for issues, but it won't fix any of them. These commands will automatically run on the active drive shown next to your cursor.
Choose Y to continue. Windows runs all sorts of services, including Service Host Superfetch , that keep a hard drive occupied. The following error messages indicate the drive is active and cannot be checked:. All these errors mean that the drive is currently busy. You might have a photo open, for example, and you simply need to close the program so the volume is no longer in use.
Another possibility is that Windows is using your drive. Type Y at this prompt:. Repeatedly tap F8 at Startup to access these options.
One way to avoid these obstacles is to use an all-in-one maintenance program. It also covers everything from clearing the browser cache to deleting junk files. The blue screen of death has been with Windows since time immemorial, but so have disk scans and methods for dealing with the blue screen of death.
The dreaded blue screen of death. In any version of Windows, open the Command Prompt and the commands to use are the same. In Windows Vista and Windows 7 , type cmd in the Start menu search bar. Type cmd there. If you've started up an old computer and see a black screen, don't worry.
You may be able to fix a black screen on Windows startup and make your computer usable again. That computer might be riddled with issues like junk files or broken shortcuts. It's always a welcome surprise when an ancient computer boots up normally. You can ensure that your current computer functions properly for years with proper PC maintenance.
Even better, you don't have to do anything different — you just have to download one program that does it all for you. It uninstalls what you don't need, cleans up the files that aren't being used anymore, and automatically updates your programs. The result is a computer that runs faster than ever.
Enjoy more memory and faster PC performance.
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