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Defrag Some of the files could not be defragmented

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  • louwoo Aug 03, 2008

    Hey Jeff,

    I defrag on a monthly basis with Windows defrag. The last two times, I got the message that some files coukd not be defragmented. The chart still had some red lines. I have 85% free space on the hard drive.



  • louwoo Aug 05, 2008

    Hey Jeff,

    On the 1st of the month I always do scan disk and check the blocks labeled: Automatically fix file system errors. Scan for and attempt recovery of bad sectors. There has never been any problems found. This has to be done on restart of computer.

    Then I run the Windows defrag.

    When I followed your instructions to the point of close DOS, I got this message:

    Windows cannot end this program. It may need more time to complete an operation.( I gave it 15" with no changes.)

    To return to Windows and check the status of the program, click cancel. (I click cancel and didnot see anything)

    If you choose to end the program immediately, you will lose any unsaved data. To end program now, click End Now.

    I have run the defrag in safe mode with the same message as before.




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Hi louwoo- Don't rate this til I've answered your question please. When you say couldn't be defragmented, did it give you an error or do you mean the chart still had some red left over after defrag? Did you use Windows defrag or Third Party software? Thanks.


Posted on Aug 03, 2008

  • Jeffrey Pemberton
    Jeffrey Pemberton Aug 05, 2008

    Hey louwoo - As far as the red lines go, you can have 0% fragmentation and still have some thin red lines. As far as some files could not be defragmented, there are several reasons you may get this message. Part of your MFT (Master File Table) might have some fragments. You can check this when you run analyze in disk defragmenter and click on view report and scroll down to the MFT section. Another reason is some people have files that are larger than 64MB that sometimes can't be defragmented right. Still another is you might have some software running that it won't defrag while in use. You might have added software in the last two months that might be running, i.e. a new anti-virus or the like. It all depends. Without getting in too deep, here's what I'd do:

    1) click on start>run>type "cmd" without the quotes in the box and then click on ok.

    2)type cd cd C: \

    You should now see C:>

    3)type chkdsk /f (space between the k and the /)

    You'll probably get a message that says it cannot be run now because the volume is locked or mounted, do you want to run chkdsk the next time you start your computer(Y/N)?

    4)Just type Y and enter. Then close the DOS box. Restart your computer and chkdsk will run and fix any errors it finds in directories, cross linked files, etc. (Won't take long)

    5) Once chkdsk has finished, you may want to just notice if it found errors and let me know. After it finishes booting completely, reboot in safe mode. You probably know how to do this but just in case:

    1)Reboot and as soon as you see something on your screen start tapping the F8 key. This will take you to a boot options menu screen.

    2) Choose SAFE MODE. This will start your pc with a minimum amount of drivers and programs.

    3)Once booted in safe mode, run disk defragmenter and see the results. Let me know what happens and we'll take it from there. Thanks.



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How Defragging a hard drive is done on Mac OS X?

To help you defragment the hard disk files in Mac computer to optimize the computer performance, please find the link given below and follow the step-by-step instructions:

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Windows Disk Defragmenter is a handy tool that may help you gain some extra performance from your PC. When Vista writes to your hard drive the bits of information that make up a file can be spread all over the disk (this is called fragmentation). The "defrag" tool will try to join up all of the parts that makes up files so that they are in the same location, decreasing the time it takes to find all of the parts.

To load Windows Defrag, run dfrgui.exe from the run box (Press WINDOWS KEY + R to load this). In this window you can choose to "Defragment Now" if you wish to perform this operation now, or alternatively you can schedule a time for your PC to defrag automatically (ideally when you are not using your PC):


If you click the button to defrag immediately, you will be informed that this is in progress but there is no graphical indicator like in previous versions of degrag.

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USING VISTA HOME PREMIUM OPERATING SYSTEM ON MY PC.........I can never get the defragment to finish.even if I leave the computer on for hours.... the computer does not show status of the defragment... so I...


If the defrag is running slow and/or runs along time but does seem like finishing look at how much free space you have. If you have less than 15% free space this will not allow you to get a good defrag of the system. You might try moving some files to another drive while you do the defrag. Also try uninstalling some programs this can help too. Then after you get the system defraged then you can put the files back and reinstall your programs.

Let me know if you have any more problems or questions


Jul 12, 2010 | Microsoft Windows Vista Home Premium for...

1 Answer

When I try to defrag my hard drive, I get a message which says "disk defragmenter could not open".

Possible Solutions:
1. Turn page file on.

Turning the page file on is a relatively simple process. Begin by selecting Start and right-clicking My Computer. Choose Properties and then press the Advanced tab. Next, choose the Settings button that is located in the Performance area; choose the Advanced tab in this area, and then press the Change button that is found in the Virtual Memory area. There will be a choice called System Managed Size in the Virtual Memory area, select it, press Set (this one is important), and then choose OK. The final move is the most important one; at this point you need to restart the PC. After you finish following these directions Disk Defragmenter should be available to do its magic.

2. Re-register the defragmenters snap-in files

It is possible that you install a third-party defragmenter like Diskeeper, then on uninstalling, it does not restore the built-in one correctly. Open Command Prompt (good ol' DOS) by clicking Start -> All Programs -> Accessories -> Command Prompt. At the command prompt type,
cd \windows\system32And then register the defrag components, by typing:
regsvr32 dfrgsnap.dll
regsvr32 dfrgui.dll

At this stage, you may find the disc defragmenter works. If not, there is one more step you can do.

Using Windows Explorer browse to your windows\inf folder.
In there you will find a file called dfrg.inf right click this file, and select Install.

3. Check if you have enough free space on the drive you want to defrag. It should have at least 15% free space.
A volume must have at least 15% free space for defrag to completely and adequately defragment it. Defrag uses this space as a sorting area for file fragments. If a volume has less than 15% free space, defrag will only partially defragment it. To increase the free space on a volume, delete unneeded files or move them to another disk.

4. Run CHKDSK on the volume first before defragmenting.
To run chkdsk on a volume (partition, disk), go to Windows Explorer (not to be confused with Internet Explorer) -> right click the partition -> Properties -> Tools tab -> Check now -> place check marks as required -> Start

5. Check if you have the appropriate services running.

Start > run > services.msc [enter]

Browse down to these services and see if appropriate settings was set.
Logical disk manager - automatic
Logical disk manager administrative service - manual or automatic
Defrag with XP also needs the DCOM Server Process Launcher service running.

6. Your computer might have spyware or malware. Some viruses/malware are known to interrupt/disable system tools such as disc defragmenter. Try to download and run No Adware (download here), an anti-spyware and adware tool. You can also use Malwarebytes Anti-Malware tool or Smitfraudfix (how to use smitfraudfix?) to remove spywares or malwares that are running on your system.

7. Install and run third-party disk defragmenting software.

8. If all of the above possible solutions fail. I'm afraid you need to repair install your OS or as a last resort, reformat your computer (but yeah, I know, nobody want to do that just because of disk defragmenter).

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To slow

Computer slowdowns have several factors.

How much memory do you have?

If its 256 or below, try adding or upgrading it to 512 mb or more. Having insufficient memory causes your computer to take some space of your hard disk as a substitute, which is a lot slower than the memory ram.

Also check how much space is available on your hard disk. About 15% of the hard disk space must be freed to prevent slowdown.

Use the Disk Cleanup tool to clean some unneeded files. Go to My Computer, then right-click the drive you want to clean up, then click Properties, and click Disk Cleanup.

Try also to defrag your files to lessen the time for the access arm of your hard disk to search/read a file. To defrag your hard disk (or other storage device), go to My Computer, then right-click the drive you want to defrag, click on Properties, then tools, and click Deframent now. Analyze first so you will know if you should defrag the volume, then defrag if necessary. Do this every month to prevent too much fragmentation of files.

Scan for virus and spyware, becuase most of them take hard disk space, memory and have high CPU usage, thus making your system slow even there is no program running. For free anti virus, try AVG. For anti-spyware, try SpyBot S&D.

Also make sure that your computer is properly ventilated. Heat could also limit the performance of your computer.

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