Fatal error when starting up Windows XP. Please help!

Posted on 2005-04-18
Last Modified: 2008-03-10
When the machine was booted up, it showed this error message on the blue screen:

Stop: c000021a{Fatal System Error}
The window Logon Process System process terminated unexpectedly with a status of
0xc0000018(0x00000000 0x00000000)
The System has been shut down

And it couldn't start up windows since. The machine was formatted with the same windows re-installed 3 times. It used to work before but now it doesn't.

Please let me know if I can provide any more information to troubleshoot this.

Thank you in advance for your help.
Question by:tapanan2519
    LVL 59

    Expert Comment

    Did this happen after installing any Microsoft Windows updates?  If so, that may be the problem, and this page has some advice on how to track it down:
    LVL 12

    Expert Comment

    LVL 12

    Accepted Solution


    Try this one instead:


    Author Comment

    I am not sure if any windows update had occurred.
    I normally let it download the update automatically.
    Is there a way to find that out? Somehow, I have a feeling that that's the problem as well.
    LVL 59

    Expert Comment

    If you look in the Windows folder, you should see a lot of folders like this listed at the top:


    where nnnnnn is a 6 digit number corresponding the Microsoft article about that particular update.  My last folder of this type is $NTUninstallKB893086$, and if I list those folders in the right pane of Explorer in Details view, there is a date of installation in the Date Modified column.  (My date for that update is 4/12/2005.)

    Oh, you will need to have "show hidden files and folders" chosen on the View tab of Tools -> Folder Options in order to see those folders, for they are by default hidden folders.
    LVL 59

    Expert Comment

    Oh, wait, you cannot log in to Windows, right?  Can you mount the drive as a slave in another pc?  Or, if the drive is formatted with the FAT32 file system, you could use a Win9x bootdisk and then use the DOS commands:

      (change from floppy disk A: to hard drive C:)

      (change to the Windows directory)

    dir /ad
      (list the subdirectories of the Windows directory)

    If your drive is formatted NTFS, the DOS solution won't work.  But you could put your XP install CD in, boot to it, and run Recovery Console.  It also has the "dir" command.

    Author Comment

    It is back up now. Thank you.
    I followed the link to update the stuff for IE.
    I still wonder though what has IE got to do with the entire system?
    But it's working so thanks, rossfingal.

    Featured Post

    Find Ransomware Secrets With All-Source Analysis

    Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

    Join & Write a Comment

    I wanted to pass this along in case anyone has a problem removing a device from the Device Manager, or if you suspect a corrupted Driver that you want to remove in its entirety. I know it is kinda lengthy and very basic in its format, but I figured …
    If your system is showing symptoms of browser hijacks or 'google search redirects' check out my other article ( first and run the tool TDSSKiller ( to get rid of the infection. Once done, and if the …
    Illustrator's Shape Builder tool will let you combine shapes visually and interactively. This video shows the Mac version, but the tool works the same way in Windows. To follow along with this video, you can draw your own shapes or download the file…
    This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor ( If you're looking for how to monitor bandwidth using netflow or packet s…

    755 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    22 Experts available now in Live!

    Get 1:1 Help Now