STOP: c000021a {Fatal System Error}

I have an DELL Dimension 2350 Computer running XP Pro. After installing some
updates, at least that is what they told me, everytime I boot up and login I
received this error:

STOP: c000021a {Fatal System Error} The windows logon process system
terminated unexpectedly with a status of 0xc0000005

I can only login using Safe with Command prompt. Here are the patches I
have installed:

KB810217
KB820291
KB821253
KB823182
KB824105
KB824141
KB825119
KB826939
KB828035
KB828741
KB835732
KB837001
KB839643
KB840374
KB842773
(SP2) Q811114
(SP2) Q819696

I am trying to resolve the problem without losing program info. Any help
would be great. THANKS.

I'm having this identical problem after installing updates on
2005-Dec-18.
My machine is a component assembled (non-branded) P4 box, the
components are all very high quality, it's not hardware related as it
boots
into the testing WinXP install (not updated yet) just fine.

I cannot even login to Safe Mode with that install, I get a continual
reboot
unless I F8 and select the option to 'don't restart on system failure'.

This is the second time in 3 months that updates have caused my
computer
to stop working.

Someone from Microsoft better have a good idea how to address this
problem
and soon. Those Mandrake discs are starting to look really good right
about
now.

Grrr.... I've gone through these boards and found problems that are close to
what I'm experiencing, but not quite...I hope/pray someone can help.

I've had a Dell Inspiron 5100 laptop with Windows XP Pro for a few years and
have had little or no problems with it until yesterday. I currently have both
Norton Anti-Virus and Spy Sweeper on this computer. Yesterday, a Spy Sweeper
window informed me that Trojan-Backdoor-Cyn was intercepted and moved to the
Quarantine folder where it could do no harm. I went to that folder and I
deleted it. Then started running a full sweep of the computer with Spy
Sweeper...just to be safe. About a third of the way through the sweep, the
computer totally locked up...couldn't move the cursor, open Task Manager or
anything...totally locked up. So, I left it for a while to see if it would
come out of it's funk, but after a while, I just powered it down by manually
turning it off at the on/off button.

About a minute later, I turned it back on. It started booting normally,
going to the screen with Windows XP Professional, then it pops up with:
"autochk program not found...Skipping Auto Check". It then immediately goes
to the blue screen with the following message:

"STOP: c000021a {Fatal System Error}
The Session Manager Initialization system process terminiated unexpectedly
with a status of 0xc000003a (0x00000000 0x00000000).
The system has been shut down."

It just stays on this screen...I've tried F8 and starting it in SAFE mode
and in the last good configuration, but it still does the exact same thing.
I've searched, but can't find my original CD's that came with the computer to
try and boot from there.

PLEASE....Any suggestions or better yet solutions to this? Thanks so much in
advance for any info you can give me...It's MUCH appreciated!

You need to find the disk provided by Dell.

This occurs when Windows switches into kernel mode and a user-mode
subsystem, such as Winlogon or the Client Server Runtime Subsystem
(CSRSS), is compromised. Security can no longer be guaranteed. Because
Win XP can't run without Winlogon or CSRSS, this is one of the few
situations where the failure of a user-mode service can cause the system
to stop responding. This Stop message also can occur as a result of
malware infestation or when the computer is restarted after a system
administrator has modified permissions so that the SYSTEM account no
longer has adequate permissions to access system files and folders.

What is your computer make and model?

Do you have data you need to recover? Is the computer you are posting
from yours and is it a laptop or a desktop?

Have you tried Last Known Good Configuration?
A description of the Safe Mode Boot options in Windows XP
http://support.microsoft.com/kb/315222/en-us

Have you Googled the STOP: error ?

I have the same problem. Can you tell me when the sfc/scannow worked for you?
Because it didnt work for me.

Thanks Gerry...I'm trying to dig up the original CD's that came with the
computer. I've moved twice since I bought it, so things are a bit askew. :)
I'll try this and let you know. Thanks again.

I have a Dell desktop with Dell installed Windows XP. Upon bootup the
computer goes to a blue screen with the message STOP: c000021a {Fatal System
Error} The Session Manager Initialization system process terminated
unexpectedly with a staus of 0xc0000034 (0x00000000 0x00000000). The system
has been shutdown.

Does anyone know what is causing this problem and how to deal with this
issue. I don't want to have to reformat the hard drive as my young grandson
would loose all of his itunes music saved on the hard drive and unfortunately
he had just spent his xmas money on new songs and had downloaded them when it
crashed. It crashed before we could back up the itunes.
--
Marcy

0xc000021a STOP error,where the ntoskrnl.exe or ntdll.dll files were not
replaced, Boot to Recovery Console, check version, date and time of
ntoskrnl.exe and ntdll.dll. expand them from the SP2 install source,
available in %windir%\servicepackfiles folder
Description of the Windows XP Recovery Console:
http://support.microsoft.com/default...b;EN-US;314058

Can anyone help. I was recently highjacked by Antivirxp08, im not sure where
it came from, but I got the screen of death. It also prevented me from
uninstalling the program from "Add and Remove Programs". After a few hours
of reseach on the net, i did manage to get it removed from my system, however
when i came to shut down my my, i am now presented with the follwoing message.

STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a
status of 0x00000000 (0x00000000 0x00000000).
The System has been shut down.

I carried out an upgrade hoping this would resolve the issue, but apparantly
not. I have all the upto date patches and service pack 3 for XP Pro. There
doesn't seem to be anything written in my events log, however this could be
because of the upgrade. I have done some searches on this probem and i found
some references to the c000021a problems, but nothing matching the same
status code i am recieving. I have tried using regcure and have run the
microsoft malicious software tool, neither have found anything. I really
don't want to have to reinstall windows xp again. So if anyone knows what
this message refers to or possibly have had this before and rectified this, i
would be grateful for you help.

Thanks

[star_saty]

When I shut down my computer this error show on Blue screen
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with
a status of 0x00000000 (0x00000000 0x00000000).
Please help me to solve this problem

I have Windows XP With SP1 installed in it.
When I shut down my computer this error show on Blue screen
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with
a status of 0x00000000 (0x00000000 0x00000000).
Please help me to solve this problem

You seem to know what you are talking about.
I have a pc with the C000021a fatal system error.
The only thing which was changed with this pc was that automatic
updates were enabled, and it seems that since MS have "updated" my pc
it is no longer usable in any shape or form.
The pc is a Dell Inspiron 510
Yes I have data I wish to recover.
No I am posting from another pc - the damaged pc does not functiion at
all.
All the MS knowledgebase artciles assume you can either access Windows
or at least access Dos. I can do neither.
Last known good config doesn't work.
Repairing Windows from the XP restore cd doesn't work.

Any suggestions?

You may be able to recover data by placing the hard drive in an external
cradle linked to a working computer.
http://support.euro.dell.com/support...dd.htm#1123687

If you are able to recover the data put the hard drive back in the
original computer and try a new clean install.

How old is the computer? Is it out of warranty?

I think what you are saying is that if I take my pc apart, bare the
guts of it to the operating table and perform surgery on the hard disk
I *may* salvage some information off the hard disk.

Well forgive me if I feel somewhat short changed by this offer that
indicates that perhaps if I work really hard I may be able to salvage
something from my beloved pc, which is really all I can expect after
it has been "upgraded" by the mighty flipping Mircosft.

Oh you are of course correct, the pc is at least four years old so all
I can really expect is that it is only good for the scrap heap.

I'm f**king disgusted by this.

[avitar366]

I had the same problem.

my laptop is a IBM Thinkpad T20.

I am posting from a different computer and i dont have any data i need to recover.

I tried all of the advanced startup options for windows and none of them work. I can't even turn my lap top on.

I do have microsoft windows 2000 installed on my laptop, It works fine but I don't know the logon password for it.

Have you got any advice, I am seriously stuck?

I have the same error as above. I have been searching all day to find some
help. I have no help yet. I am using an XP disk and using the Repair option
to get to DOS. I cannot log into the system at all...ever. I am using an old
Dell Latitude D520 laptop with the SP2 installed. It a friend of mine's
computer who needs to keep some of the programs on the system because she
does not want to pay for more MS software.

I've also had intermittent 'C000021a' errors after loading SP3 onto customer systems
but haven't tried this approach. It does sound reasonable though. Can an MVP please
post an opinion on this 'fix'?

[spike j]

I think I have a fix, it worked for me on an IBM thinkpad T23 running XP Pro

Things went wrong updating to sp3 and all I could get was c000021a.

This is what I did..

On another computer I downloaded Ubuntu (linux OS) and burned it to a CD then put it in the Thinkpad and booted from CD. This loads Ubuntu and I can run the OS from the CD, you don't have to install it, its a way of letting run it without installing it. Once loaded up I can navigate round it like windows. Next I got a usb memory stick and put on it these files: Winlogon.exe, Csrss.exe and Msgina.dll from another PC running XP pro SP2. then I transfered the memory stick to the Thinkpad and replaced the files on there with these, over writing the old ones. I then rebooted after removing the Ubuntu CD and things were (so far) back to normal on XP. I turned off auto updates to stop any more attempts to put SP3 on.

Hope this works for you, I was pulling my hair out!!!!

Please let me know how you get on.

The reason I did what I did to fix this problem was that I came to the conclusion after reading some of the stuff on the microsoft site that files: Winlogon.exe, Csrss.exe and Msgina.dll could get changed or overwritten while upgrading to SP3 (which is when this laptop died) So common sense told me to take the files from a working PC and copy them to the Laptop. The only way I was going to do this was either remove the hard drive and plug it in as a slave or run a live OS from a CD, in this case Ubuntu. this got me in to the hard drive so I could copy the files in the right place.

I have searched a fair few forums and could not find one single person that has fixed this problem, am I the only one or do folks keep these thing to them selves???