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Thread: STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

  1. #1
    Join Date
    Dec 2008
    Posts
    39

    STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    Hello everyone,

    My PC has suddenly stopped and I restarted. The PC stops after I hear a suspicious noise. This is twenty times that I suspect that noise monitoring of the shutdown of the PC. Sometimes it was during the same time the screen "Windows XP Pro" with the blue progress bar appears as noise is heard and then the progress bar does not move and I have rebooted the PC.

    I opened the case but I can not find anything wrong but it is a specific sound.

    During reboot the PC was still stop on a blue screen displaying this:

    STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    What this messages means? and what do I do?

    Thank you very much

  2. #2
    Join Date
    Mar 2008
    Posts
    212

    Re: STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    Regarding your problem ,here is a link:

    http://support.microsoft.com/?scid=k...4474&x=20&y=14

    so if there is a somekind of driver problem,i think you must try firstly to replace the ntdll.dll, take your windows XP installation cd and boot into recovery console,if you have a second optical drive or floppy disk,copy a new version of ntdll.dll,see below:

    http://www.dll-files.com/dllindex/dll-files.shtml?ntdll

    so find the location of the file on your current installation,must be C:\Windows\System32\ or %Systemdrive%\Windows\Sytem32 and replace it with this new one from the link,if this not help,i'm sure there is a copy of the ntdll.dll on your windows installation cd ,but if it's stored in a cab file it will take little longer to find it, give it try

    Good luck!

  3. #3
    Join Date
    Dec 2008
    Posts
    1,108

    Re: STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    Refer this similar error thread:

    stop: c0000221 unknown hard error on blue screen

    Hope this will help.
    The difference between stupidity and genius is that genius has its limits. - Albert Einstein

    What we think, we become (Please don't think you are a superhero and don't try to fly)

    "SUCCESS IS NOT A DESTINATION , IT'S A JOURNEY"

  4. #4
    Join Date
    Oct 2008
    Posts
    170

    Re: STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    After the 20th time I doubt that there still have something to read on the hard disk.

    but I think it really should not "play" in and take him to a technical service (hard to verify a physical pc via the forum ...).

  5. #5
    Join Date
    Oct 2008
    Posts
    143

    Re: STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    A quick Google brought me to a number of articles in Microsoft's support site. Per the link below, it can be anything from bad/damaged hardware to a missing file.
    http://support.microsoft.com/search/...2&mode=a&adv=1

    Best recommendation I can make - do a complete reformat/reinstallation of WinXP. If the problem persists, and you haven't installed any pirated or unknown software, then it's a hardware issue.

  6. #6
    Join Date
    Nov 2009
    Posts
    1

    Re: STOP: C0000221 Unknown Hard Error \SystemRoot\System32\ntdll.dll

    1. UNPLUG THE POWER TO THE COMPUTER
    2. OPEN THE CASE
    3. UNPLUG YOUR HARD DRIVE RIBBON AND POWER CABLES AND PLUG THEM BACK IN.
    4. CLOSE EVERYTHING UP AND PLUG IT BACK IN
    5. POWER IT UP


    You should find the problem solved.

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