unrecoverable system error getting error c000021a a knowndll verification code has no...

My friends computer is an HP with windows vista home 64-bit edition.  It's getting an error code of which follows: stop: c000021a (fatal system error) the verification of a knowndll failed.  system process finished in unexpected ways with the State of 0xc0000020 (ox8a3a36c8 0x00000000). the system stopped.  It cannot start window normally or in safe mode.  Ran startup repair, and that Startup Repair cannot repair this computer automatically. What should I do next? Any help would be appreciated!

Hi Maf3246,

Welcome to the Microsoft Answers site!


I suggest you follow these methods.

Method 1

Last known good configuration

It's a Windows startup option that uses the most recent system settings that worked correctly. Whenever you turn your computer off and Windows shuts properly, important system settings are saved in the registry. If a problem occurs, you can restart your computer using these parameters. For example, if a new driver for your video card is at the origin of the problems, or an incorrect registry setting is preventing Windows from starting correctly, you can restart your computer by using the last good known Configuration.

1. remove all floppy disks, CDs, and DVDs from your computer and restart your computer by clicking the Start button, clicking the arrow next to the shut down button, and then clicking restart.

2. do one of the following:

·         If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you need to try again by stopping and restarting your computer.

·         If your computer has more than one operating system, use the arrow keys to select the operating system you want to start, and then press F8.

3. in the display Advanced Startup Options , use the arrow keys to select last known good Configuration (Advanced), and then press ENTER.

4. If your computer has multiple operating systems installed, use the arrow keys to select the operating system that you want to start using the last good known Configuration, and then press ENTER. Windows will then resume starting normally.

Method 2

CHKDSK (Chkdsk.exe) is a command-line tool that checks volumes for problems. The tool tries to repair any that it finds.

1 boot from the DVD
2. Select the language
3. click on "Repair your computer" on the install now screen
4. click Next in the System Recovery Options screen
5. click on command prompt.
6 type the command chkdsk and press enter

Method 3

Offline system restore.

1 boot from the DVD
2. Select the language
3. click on "Repair your computer" on the install now screen
4. click Next in the System Recovery Options screen
5. click on system restore.
6. choose the date that you want to restore

See this link for more information.
A Windows Vista computer that has a partition to the Windows recovery environment (Windows RE) is not restored successfully using Windows complete PC Backup and Restore
http://support.Microsoft.com/kb/946010

Good luck

Bindu S - Microsoft Support
Visit our Microsoft answers feedback Forum and let us know what you think

Tags: Windows

Similar Questions

  • Loss of Q10 of blackBerry battery life after updating OS level and unrecoverable system error now

    I have updated the OS on my Q10 about 2 weeks after a prompt on the phone. Since then, the battery drains within 3 hours, even on airplane mode. I was not really able to use the phone at all if it is connected, the battery will be part of fear in an emergency. The battery gets hot while the phone is turned on, and the browser is very very slow.

    I tried switching batteries - no change.

    I searched several forum posts here and on crackberry and saw the recommendations of reset to factory and reloading. Link to BB says I must have a software update (on my desktop) to reset my phone, but 12 tries to download the update result just in an error message.

    When told to turn off the phone, she returned with error message: bberror.com/bb10-0015 - unrecoverable system error?

    BB.com says download software - try a message via this page instead of the link BB - same error on the office.

    My Q10 are already dead for good, or is there still something I can do?

    Afraid to replace it with a new BB, because each new model has a shorter and shorter life span, and I fear the next round will not last a month.

    with this error message:

    First of all, have you read the instructions on http://us.blackberry.com/support/error-codes/os10/error-bb10-0015.html?CPID=VAN-ERRBB10-0015

    If this is not successful, you will need to use a charger automatic file to connect and reload the operating system.

    Updated peripheral OS10 using the ADF

  • c:000021 has unrecoverable system error. The system process window logon ended unexpectedly with a blocking ststus 0x00000000. The system has been shut down

    c:000021 has unrecoverable system error. The system process window logon ended unexpectedly with a blocking ststus 0x00000000. The system has been shut down

    Pls teach the procedure for resolution of the problems of this error message.

    Hi mac62sg,

    Remember to make changes to the computer before this problem?

    You can follow the steps mentioned in the article below

    How to solve an error "STOP 0xC000021A.

    http://support.Microsoft.com/kb/156669

    Important : this section, method, or task contains steps that tell you how to modify the registry. However, serious problems can occur if you modify the registry incorrectly. Therefore, make sure that you proceed with caution. For added protection, back up the registry before you edit it. Then you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click on the number below to view the article in the Microsoft Knowledge Base:

    How to back up and restore the registry in Windows
    http://support.Microsoft.com/kb/322756/

    Thank you, and in what concerns:

    Ajay K

    Microsoft Answers Support Engineer

    Visit our Microsoft answers feedback Forum and let us know what you think.

  • I have Apple TV gen 1. I changed my iTunes password and now I can't the Apple TV in the House. It will connect to iTunes. I type my Apple and a new password. My phone Gets a text with a verification code, but the Apple TV says wrong user

    I have Apple TV gen 1. I changed my iTunes password and now I can't the Apple TV in the House. It will connect to iTunes. I type my Apple and a new password. My phone Gets a text with a verification code, but the Apple TVsaybadusername password or.

    Your ATV1 has an old software system not updated for years.  You have 2 factor (6 digits) or authorization of step 2 (4 digits) enabled for your Apple account.  Here are the characteristics of the latter.  I disable these on your Apple account and try again.

    For Apple ID - Apple Support two-factor authentication

    Frequently asked questions about the audit in two steps for Apple ID - Apple Support

  • Satellite A100 - unrecoverable system error and restart

    Without warning my Satellite A100 don't close but reboot, I removed the auto reboot, and the error that is displayed in the BSOD is:

    STOP: c000021a {fatal system error}
    The Windows Logon Process system process ended unexpectedly with status 0xc0000000 (0x00000000 0 x 0000000)

    in the event where Viewer does not appear anything on the error, I tried a system restore but it cannot exercise, in the event viewer this time it is written that he cannot run because the PC is not turned off regularly,
    How can I do?
    The BSOD appear in the last stop after the color screen when turned on the black screen just before the
    Turn off the power.

    your
    Fabio

    Hi flottero,

    It of always a little difficult to discuss these blue screens because many things could be the reason, but in most cases it s a hardware or driver problem.

    If system restore doesn't work, can you try to restore Windows recovery disk settings, please? After that, you get back factory settings and so you can identify a hardware problem or software.

    Check this box!

  • Satellite L300 - 16L - unrecoverable system error

    When you try to reboot from the recovery disk, I get the message
    "STOP: c000021a (fatal system error)." The initial session process or the process of the finished system unexpectedly with a status of 0 x 00000000 (0xc0000221 0x0010034c).
    The system has been shut down "."

    Does anyone know what I would do next to attempt to get this working of the laptop?

    Hi stevel_1,

    Can you tell us what laptop you have, please?

    You use original Toshiba laptop recovery disk?
    You may notice the same problem using a disc of Microsoft?

  • Unrecoverable system error

    First of all, I get the blue screen whenever I try to start my computer and this is the message that goes with it:

    Stop: c000021a {fatal system error} the windows logon system process ended unexpectedly with the status of 0xc0000034 (0x00000000 0x00000000)

    This all started because I had some sort of spyware or something that would be redirecting my searches google for random websites. I tried to use Malwarebytes to get rid of it, didn't work.  Then I went on my computer friends and downloaded its Norton Security installation folder on my flash drive and installed it on my computer successfully. It finds viruses then prompted me to restart the computer, so I did. Now, I can't load windows at all without getting the blue screen. I can also run it in safe mode. Any help would be greatly appreciated!

    Hello

    Method 1:

    As you are not able to boot to the desktop in any mode, you need the Windows XP installation CD to install the Windows Recovery Console and run a check disk in the same.

    Follow the links given below to install the Windows Recovery console and run the check command line disk drive.

    How to install and use the Recovery Console in Windows XP

    http://support.Microsoft.com/kb/307654

    How to perform disk error checking in Windows XP

    http://support.Microsoft.com/kb/315265

    Method 2:

    You can also read the article given below for the same error message.

    How to solve an error "STOP 0xC000021A.

    http://support.Microsoft.com/kb/156669

    Hope this information is useful.

    Amrita M

    Microsoft Answers Support Engineer
    Visit our Microsoft answers feedback Forum and let us know what you think.

  • Unrecoverable system error! Help, please!

    I left my computer for 5 minutes, when I came back I got a blue screen with STOP

    Fatal error c000021a session initial system or process system ended unexpectedly with status 0 (xC0000001) (0x0010037c). I get a blue screen and my screen of the homepage is very low. Help ASAP!

    Christine

    Hi Siciliangal,

    Welcome to the Microsoft Community Forums.

    According to the description, it seems that you are getting BSOD error message "c000021a fatal system error '. I'll be happy to help you with this problem.

    This error occurs when a subsystem of mode user, such as WinLogon or the Client Server Run-Time Subsystem (CSRSS), irremediably compromised and security can not be guaranteed. In response, the operating system goes into kernel mode. Microsoft Windows cannot run without WinLogon or CSRSS.

    -Did you do changes on the computer before this problem?

    Method 1:

    Last known good configuration

    It's a Windows startup option that uses the most recent system settings that worked correctly. Whenever you turn your computer off and Windows shuts properly, important system settings are saved in the registry. If a problem occurs, you can restart your computer using these parameters. For example, if a new driver for your video card is at the origin of the problems, or an incorrect registry setting is preventing Windows from starting correctly, you can restart your computer by using the last good known Configuration.

    1. remove all floppy disks, CDs, and DVDs from your computer and restart your computer by clicking theStart button, clicking the arrow next to the shut down button, and then clickingrestart.

    2. do one of the following:

    · If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you need to try again by stopping and restarting your computer.

    · If your computer has more than one operating system, use the arrow keys to select the operating system you want to start, and then press F8.

    3. in the display Advanced Startup Options , use the arrow keys to selectlast known good Configuration (Advanced), and then press ENTER.

    4. If your computer has multiple operating systems installed, use the arrow keys to select the operating system that you want to start using the last good known Configuration, and then press ENTER. Windows will then resume starting normally.

    Method 2

    CHKDSK (Chkdsk.exe) is a command-line tool that checks volumes for problems. The tool tries to repair any that it finds.

    1 boot from the DVD.
    2. Select the language.
    3. click on "Repair your computer" on the install now screen.
    4. click Next in the System Recovery Options screen.
    5. click on command prompt.
    6 type the command chkdsk and press ENTER.

    Important: When running chkdsk on the drive if bad sectors are found on the disk hard when chkdsk attempts to repair this area if all available on which data can be lost.

    Method 3

    Offline system restore.

    1 boot from the DVD.
    2. Select the language.
    3. click on "Repair your computer" on the install now screen.
    4. click Next in the System Recovery Options screen.
    5. click on system restore.
    6. choose the date that you want to restore.

    See this link for more information.
    A Windows Vista computer that has a partition to the Windows recovery environment (Windows RE) is not restored successfully using Windows complete PC Backup and Restore
    http://support.Microsoft.com/kb/946010

    I hope this helps. Try the above steps and get back to us for assistance. We will be happy to help you.

  • I am trying to download the trial version of DC Pro and at the end of the installation get an error message indicating an invalid code has been provided - what should I do?

    What should I do when I get an error message relating to a code not valid when you try to download DC Pro?

    you don't need a code/serial number to install a trial version.

    Available downloadable Setup files:

    Download and installation help links Adobe

    Help download and installation to Prodesigntools links can be found on the most linked pages.  They are essential; especially steps 1, 2 and 3.  If you click on a link that does not have these listed steps, open a second window by using the link to Lightroom 3 to see these "important Instructions".

  • system error c000021a fatal

    I get this error code tracking 0xc0000006, 0x75eb4f51, 0x0069e15c.  I have a computer dell laptop that won't let me do anything.  I hit the F8 key while turning on the computer and he won't start in safe mode or anything.

    I have several mistakes STOP c0000021a in my notes and knows how to fix them, but nothing like as what you posted.

    There is always more to the message when I see these mistakes than what you have listed.

    Is it really all that you see or is it most associated with the message?

    I suspect that AVG deleted a file system of the XP Christiane thinking that he was infected (maybe it was).

    If he were winlogon.exe, you can just replace it (using a copy/paste) the backup copy on your hard drive from a bootable CD, you can do (no XP media required).  Answered in the affirmative if invited to replace the existing file.

    You can search your HARD drive for winlogon.exe and replace the one in c:\windows\system32.

    Places to find a copy are:

    c:\Windows\System32\dllcache

    c:\windows\ServicePackFiles\i386

    Answered in the affirmative if invited to replace the existing file.

    You're always going to have to start on something to fix no matter what it is, so I could do this:

    Do you have a Hiren BootCD you can download here:

    http://www.hirensbootcd.NET/

    On the left, click on download, scroll down, choose the latest version, the download link is a little hard to see.  It is at the bottom of the page, above the drop for older versions and looks like this (click this component to download the ZIP file):

    Direct HTTP mirror + Torrent, Torrent Magnet

    Click the "Live HTTP Mirror" link to start the download and save the ZIP file on your desktop of somewhere that you can remember.

    The ZIP file is large, so the download will take probably some time to complete.  Then unzip the download to extract the Hirens.BootCD.ISO file that will be used to create your new bootable CD.

    Create a bootable CD. ISO file is not the same as simply copying the. File ISO onto a blank CD.  You must use software that includes how to burn a. ISO to a CD to create a bootable CD.

    File ZIP the Hiren is the file BurnToCD.cmd that you can double-click to launch it.  The BurnToCD.cmd will use the file BurnCDCC.exe to burn the. ISO file onto a blank CD using your existing CD burner.  You can also use your own burning software as long as your software is able to create a bootable CD. ISO file.  More modern burning programs can create a bootable CD. ISO image.  Create a CD from an ISO image bootable is not the same as just the file on a CD burning.

    If you need a simple and CD burning, this is a free software popular software:

    http://www.ImgBurn.com/

    Here are some instructions for ImgBurn:

    http://Forum.ImgBurn.com/index.php?showtopic=61

    It would be a good idea to test your new bootable CD on a computer running.

    You may need to adjust the computer BIOS settings to use the CD-ROM drive as the first device to boot instead of the hard drive.

    These adjustments are made before Windows tries to load.  If you miss it, you will need to restart the system again.

    When starting on the Hiren's CD, you will see a menu of options.  Choose Mini XP.  It will appear while Windows is loading and you will be presented with a desktop computer that has the look and feel of the interface of Windows Explorer, you are already accustomed to using.

    Using the Mini XP, you can access the Internet, maneuver around your system,search for files, copy files, replace the files, run the scans for malware, edit the text files (like the c:\boot.ini) etc.

    There are dozens of free and useful tools included in the CD that can be used to repair your system or copy your important personal files on another device (like a USB device or an external drive) in the case where you just give up and decide to reinstall your XP (I hope that you will not make this decision).

    Do, or do not. There is no test.

    I need YOUR voice and the points for helpful answers and propose responses. I'm saving for a pony!

  • HP mini 110: System stopped unrecoverable system error

    Serial number Cnu9405s0h. Error fatal system shut down. Do not know the password

    Hello

    Enter: e9lov1qn1z (3rd character is a lowercase L)

    Kind regards

    DP - K

  • Blue screen error - system error c000021a fatal

    I have the HP ENVY 4-1046tx Ultrabook
    The last time I forced to stop the laptop (because he hanged!)

    and after that, I got this error

    safe mode is not a job
    and last know good configration disnt had no effect.

    sugguest a way out of this...!

    Solved... Solved solved n...

    by some means (not so), I have installed window in there...!

    THNXX for help and suggestion.

  • System error: XBox - E200 000000EF 00000000 Code customer service

    My son turned on his machine a Xbox to find this code on it several weeks ago now and was not able to use the machine since then.  We have everything disconnected and reconnected it all several times and still it comes up with this message.

    Despite several calls to Customer Support line Xbox, we cannot get an answer so uncertain how solve the problem. In the meantime, my son has not been able to use its subscription xbox live and it is now sold out.  We must have called the hotline, about 10 times which have placed us around 14 in the queue and by train to lose the will to live while we wait to be connected.

    I did the last call and remained on the line longer than 3 hours and got to the stage of the response to then find none here!

    (I'm now a mother exasperated for a 11 year old boy, very frustrated and want to know if anyone has one) met this problem and/or b) knows how to solve the problem?

    Help, please

    concerning

    Sue

    Hello

    Your Question is beyond the scope of this community...

    I suggest that repost you in the Xbox Forums.

    "Xbox a Preview program FAQ.

    http://support.Xbox.com/en-us/Xbox-one/system/Xbox-update-preview-FAQ

    'Home'

    http://forums.Xbox.com/

    "Xbox forums.

    http://forums.Xbox.com/xbox_forums/general_discussion/f/3817.aspx

    _________________________________________________

    "Xbox Forums directory.

    http://www.Xbox.com/en-us/forums

    General

    Material & Discussion Services

    Xbox support
    Agent hours: M - F 09:00-17:00 PT

    Law enforcement forums

    Technical support of Xbox Live rewards
    Xbox Live rewards Squad hours: M - F 09:00-17: 00 PST

    See you soon.

  • I have an error message here fatal system error status 0x00000000 and (0 xC0000001 - 0x0010037c can someone help me)

    • Hello I have an acer 5535 with vista home premium 64 bit, I ordered the acer windows 7 upgrade and I put 8 in and was able to get threw the first disc it gave me the option of removing the acer erecovery system empowering so I did and my computer off in the process, so I started it up and it wouldn't load windows 77 disc so I just kept vista on my computer and went to the site acer and re downloaded acer e recovery it downloaded and I tried to restore my computer and I got the screen black of death with the cursor flashing today I got the recovery disc in the mail from acer to fix my computer but when I put the disc in it will load only the first disk and then cut what happened the first for the second time I set the time and I recived an error message that says STOP: C000021A and less it was displayed {0 UNRECOVERABLE SYSTEM error STATUS x 00000000 AND (0 xC0000001 0X0010037C SYTSTEM SHUTDOWN and tyhen my computer turns off the only thing I can do is to get into the bios, I think it's where I hit f12 I tried to get the disc to load by f12 and it load and stop at the center of the process I'm not savvy)} in computer science, but I wish well for some suggestions iam going crazy here without my computer Please HELP :)

    Hello

    I suggest you perform a new installation of Windows 7 by formatting the hard drive.

    Follow these steps:

    1. turn on your computer so that Windows starts normally, insert the Windows 7 installation disc or a USB flash drive, and then turn off your computer.
    2. restart your computer.
    3. press a key when you are prompted, and then follow the instructions that appear.
    4. on the Install Windows page, enter your language and other preferences, and then click Next.
    If the Install Windows page does not appear and you are not prompted to press a key,
    5. on the page Please read the terms of the license , if you accept the license terms, click I accept the license terms, and then click Next.
    6. to the which type of installation you want? page, click custom.
    7. on the where you want to install Windows? page, click options (Advanced) readers.
    8. click on the partition that you want to change, click the formatting option you want to run and follow the instructions.
    9. When you are finished formatting, click Next.
    10. follow the instructions to complete the installation of Windows 7, include the name of your computer and setting up an initial user account.

    Check this link for more information:

    http://Windows.Microsoft.com/en-us/Windows7/installing-and-reinstalling-Windows-7

    http://Windows.Microsoft.com/en-us/Windows7/installing-Windows-frequently-asked-questions

    Kind regards
    Amal-Microsoft Support.
    Visit our Microsoft answers feedback Forum and let us know what you think.

  • Samsung NC10 problem... error c000021a... Help

    at the start of my samsung nc10 windows starts to load and then goes to error n EMP:

    Stop: c000021a fatal error

    then restarts. I tried all F8 options and none of them work :(

    as you know this laptop does not come with hard drive so don't know what to do.

    HELP Please

    Hello

    ·        Remember to make changes to the system?

    C000021a error is a memory leak error that can be caused by many factors. If get this fatal system error c000021a you could have done something that makes leaks memory in your windows operating system.

    How to solve an error "STOP 0xC000021A.

    http://support.Microsoft.com/kb/156669

    If you have installed on the system, then recovery console, I suggest you to make a manual system restore and check. Follow the steps mentioned in the article below.

    Description of the Windows XP Recovery Console for advanced users

    http://support.Microsoft.com/kb/314058

    How do I recover from a corrupted registry that prevents Windows XP startup

    http://support.Microsoft.com/kb/307545

    If you have not installed on the system then recovery console, unfortunately there is nothing we can do. I suggest you to contact Samsung support for assistance. Click on the link below.

    http://www.Samsung.com/UK/support/detail/supportPrdDetail.do?menu=SP01&prd_ia_cd=&prd_mdl_cd=&prd_mdl_name=NP-NC10

    Thanks and regards.

    Thahaseena M
    Microsoft Answers Support Engineer.
    Visit ourMicrosoft answers feedback Forum and let us know what you think.

Maybe you are looking for

  • SLO Safari to load Rich Media content

    It all works well in general, whenever I load a rich media page (lots of photos, etc.) the page will be slow to load, if I click on a link to follow a story it will take forever to make the change, in most cases it will take a long time for the 'hand

  • Problem with Pause button

    Probably, my question is really stupid, but I tried to solve it in different ways without success... In the attachment, you can see the piece of my program with the problem (I can show additional, if necessary). I want to be able to suspend the acqui

  • Cannot get rid of the BIOS password

    Bought an ACER Aspire E1 from an EBAY of ACER store about a year ago. A few weeks ago, I started it and quickly received a BIOS PASSWORD entry. Since that time, the laptop was absolutely worthless. I guess I tried the hardware, software, battery and

  • error code 57 when executing that Windows update

    I get the error code 57 and the 8024200d error code when you try to run Windows update

  • HP envy5546: Photo print is ugly

    Hello. I just plug a laptop Hp Pavilion with a range of printers hp envy 5546. I downloaded the app hpmobile and am trying to use my printer. If I print A4 images or documents, they are superb quality however all photos printed on a small paper 100x1