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Blue screen error stop: c000021a in windows xp

I have read through the previous solutions with no help. I can' t get into safe mode and I have switched the BIOS so that I ca boot from the CDROM but it goes straight to windows and the blue screen with the error-

Stop:c000021a {fatal system error} system process terminated unexpectedly with a status of 0xcooooo34 (0x00000000 0x00000000). The system has been shut down.


This happened when during an automatic update. I have read about the causes from microsoft and tried to get back into the computer with no luck. Safe mode won't work or safe mode with command prompt. I don't have a floppy disk drive installed. If I can get back into the computer I'm pretty sure I can fix it but I am stuck. Help!
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mimi6723
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mimi6723
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1 Solution
 
phototropicCommented:
Boot from your XP disk and start Recovery Console (option 2 at the first screen).

At the prompt, type chkdsk /r

Let it run and fix any errors it finds. When it completes, reboot.

Can you reach the desktop now?
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mimi6723Author Commented:
I tried last known good config. It went back to the blue screen.  
I can't boot from the disk for some reason. I changed the BIOS so that all boot choices would be CDROM but it still keeps going to the blue screen
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baptistblokeCommented:
Similar thing happened to me!

was the update to Service pack 2?

To hault the boot process put a Win98 Boot Floppy in the PC, and make sure Floppy is a bootable drive before HDD

If it was a service pack here is how to remove it from the Recovery consol as found on MS website at

http://support.microsoft.com/KB/875350

1. Insert the Windows XP startup disk in your floppy disk drive or insert the Windows XP CD in the CD drive or in the DVD drive, and then restart your computer.

Note When you receive the following message, press a key to start your computer from the Windows XP CD:
Press any key to boot from CD

Note Your computer must be configured to start from the CD drive or the DVD drive. For more information about how to configure your computer to start from the CD drive or the DVD drive, see the documentation that came with your computer or contact the computer manufacturer.  
2. When you receive the Welcome to Setup message, press R to start the Recovery Console.

Note Multiple options will appear on the screen.
3. Select the Windows XP installation in question.

Note You must select a number before you press ENTER, or the computer will restart. Typically, only the 1: C:\Windows selection is available.
4. If you are prompted to type an administrator password, do so. If you do not know the administrator password, press ENTER. (Typically, the password is blank.)

Note You will not be able to continue if you do not have the administrator password.  
5. At the command prompt, type cd $ntservicepackuninstall$\spuninst, and then press ENTER.

Note After you complete this step, you cannot stop the removal process.  
6. At the command prompt, type batch spuninst.txt, and then press ENTER.

Note The Spuninstal.txt file appears. As the file scrolls down, you will see errors and files being copied. This is normal behavior.
7. After Windows XP SP2 is removed, type exit, and then press ENTER.
8. Restart your computer in Safe Mode. To do this, press F8 as the computer restarts.
Note After you restart, the system may lock up with a black screen. (Your mouse will work.) In this case, restart again by turning the computer off and then back on. The second restart will let you to log on.
9. When your computer restarts, Windows Explorer (Explorer.exe) does not run, and the Windows icons and the Start button are unavailable. To resolve this problem, follow these steps: a.  Press CTRL+ALT+DEL to start Task Manager.
b.  Click File, and then click New Task (Run...).  
c.  In the Open box, type regedit, and then click OK.
d.  Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcSs
e.  On the right side of the viewing pane, right-click ObjectName, click Modify, type LocalSystem in the Value data box, and then click OK.  
f.  Restart your computer

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phototropicCommented:
Sorry I didn't get back to you...been a busy week.

How far do you get when booting up before the BSOD?
You get past the BIOS screen. Does the loading bar begin to scroll across the screen? Do you get any further than BIOS info?
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phototropicCommented:
Baptistbloke,

He said in his post that he doesn't have a floppy drive, so that option is out.
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baptistblokeCommented:
oh pants!

oh well... the floppy idea was to hault the bootup

If you can find another way then the SP removal (should it be a SP problem) will still work
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mimi6723Author Commented:
I have gotten nowhere. I can't boot at all. I can get to the page to choose which safe mode I want but when I choose  one it always goes back to the error. When it gets to where it verifies the DMI it jumps straight to windows then the error. It doesn't give me the chance to choose to boot from CD.  Would changing the HALT ON  help. That is what lets errors through or not right? Right now it is on  ALL BUT KEYBOARD. If this is a software problem then would it do damage to the computer to change it to HALT ON NO ERRORS. Maybe that would let me through. Do you think?
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phototropicCommented:
At this stage it is worth a try, but rememberto re-set it afterwards.

Can you log on now?
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mimi6723Author Commented:
no it didn't work. This is so frustrating! Should I just restore the hard drive and get it over with?
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phototropicCommented:
It is hard to see where else to go with this one...
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phototropicCommented:
However, if it won't boot from the CD, that could be tricky.
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Expert4XPCommented:
mimi6723, can you tell us a little more about your computer?  I think we all want to help, but need to be able to boot from something to repair your computer.  Is is a Dell, HP, Sony etc?  And model number?  Maybe we can look up information on the internet about getting the boot from CD to work.
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mimi6723Author Commented:
I built it. specs are

gigabyte K8 Triton AGP 8X dual channel DDR400 motherboard. GA-K8NSC-939
AMD athlon 3500 939 PIN processor
2- PNY 512mb memory
Soundblaster live sound card
nvidia video card. can't remember the model
maxtor Diamond plus 9 hard drive
internal double layer DVD rewritable drive- can't remeber the brand.

all is new except the video card.
If you need more info. I can open the computer to look for more on the video card and DVDRom
Thank you
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Expert4XPCommented:
This is from p. 29 of the manual:
GA-K8NSC-939
http://america.giga-byte.com/FileList/Manual/motherboard_manual_k8nsc939_e.pdf

(sorry if you already know this).

Insert your XP Startup boot CD in CD drive.

First, power off your pc.
To get into the BIOS, press Delete key after power on button,
Cntrl F1

p. 38 of manual:  

First / Second / Third Boot Device

CDROM Select your boot device priority by CDROM.

save settings and exit.  It "should" boot from your Windows XPcd rom.
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mimi6723Author Commented:
I have done this and double checked the settings in the BIOS. It won't boot.
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Expert4XPCommented:
Do you have any other boot disks that you can try?  Such as an old Windows 98 boot cd, or other system boot cd?  Just to verify.

Without the capability to boot from a CD, you will have to go to Plan B, which probably means removing your hard drive and putting it in a parallel XP system to try to repair offline.  Or take your pc to a pc specialist. (I hate to give up, but at least I myself am running out of options.)

Anyone else with ideas ?
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mimi6723Author Commented:
No. It looks like I am out of options. Unless someone else knows what to suggest.
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Expert4XPCommented:
Is it possible the CDROM is defective?  Do you have another cdrom from another pc that you could temporarily connect to this pc?  Put your startup cd in it, power off, then power on with your cd in there, and see if you get the option to boot from cd.
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phototropicCommented:
If the pc will not boot from the CD, there are 4 options:

i) The drive is defective; can you try it in another pc or replace it with a known good unit?

ii)The disc is faulty. Normally you would expect an error message in this case, but can you try the CD in another machine?

iii)The IDE cable from the drive to the m/board is faulty. Try setting jumpers to "slave" and mounting the CD on the same cable as the HDD; does it work now;

iv)The m/board is faulty. Not much room to maneuvour here. Have you installed current drivers for the m/board?

Another option is to temporarily install a floppy drive and boot from that. Boot disks can be downloaded here:

http://www.answersthatwork.com/Downright_pages/downrights_bootdisks.htm
http://www.bootdisk.com/bootdisk.htm

Good luck!!
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mimi6723Author Commented:
I'll try those suggestions and let you know. Thanks
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mimi6723Author Commented:
Well i tried the floppy drive and it skipped right over it. I changed the BIOS to boot from floppy on all three. Can I restore my hard drive from the BIOS? It wouldn't let me do that either. This is so irritating!! Any other suggestions?
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Expert4XPCommented:
It sounds to me like your motherboard is dead:

1. You can't get it to boot from CDROM
2. You can't get it to boot from diskette
3. You can't get it to boot from your hard drive (I know you said it failed during the update, but what failed?--the update or the motherboard?)

I would remove the hard drive, put in another PC, recover your user data, save that on cd/dvd, then replace motherboard and install XP fresh, recovery data.

Not a pleasant task, but what's the alternative?
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mimi6723Author Commented:
It was after an update. It updated and  the next day when my son  went to turn it on it had the blue screen
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Expert4XPCommented:
I'll have to admit I am puzzled, because regardless of the software problem, you should be able to boot from a diskette and/or cdrom.

If you can't boot from either of those, how are you going to install anything?

Did you try resetting the pc BIOS to factory default and then try again?
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mimi6723Author Commented:
I'll give that a shot. I haven't tried that yet. And by the way, thanks for stickin' with me!!!
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mimi6723Author Commented:
Well reseting the BIOS didn't help. I tried unplugging the dlink and speakers. I don't know why that would make a difference but I will try anythink. I tried  to restore the hard drive from F9 and it didn't do that either.
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Expert4XPCommented:
I hate to say I give up, but at this point, my recommendation is that you take it to a local computer service shop.  You've done everything obvious.  Someone really has to physically look at everything.  It's possible it's the power supply or power connector, some other cable, or motherboard itself.  A shop would be able to test those things, as well as advise you on recovering your data from your hard drive if needed.

Although it appears that it happened during the automatic update, that's not to say the the update CAUSED the computer failure.  You could have been working on a document in Word, as an example, and gotten the error code.  (I'm not saying this is the case, just thinking aloud.)

Maybe some other EE has an idea.  I hope you'll post back here what the final diagnosis is.  I hate to say I can't fix something, but my remote-control tools are about exhausted at this point.

Good luck!
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mimi6723Author Commented:
ok. I installed a new hard drive. The install is going well. Can I make my old hard drive the slave and go into it to fix it that way?
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Expert4XPCommented:
Are you saying that after you put in a new hard drive, now the CDROM is working and everything else is working?  That makes it sound like your old hard drive has malfunctioned and the reason you couldn't boot was because when the old hard drive was connected, it prevented the motherboard from starting up, probably from some total electrical failure of the old hard drive.

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mimi6723Author Commented:
Yeah everything is working great so far. If I slave the old hard drive would it hurt  the new one. The old one is only two months old.  I did notice that I had the ROM on slave instead of master. Maybe that was part of the problem. It is the only ROM on the computer though.
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Expert4XPCommented:
You could test your theory by FIRST removing your new drive, then changing your old drive from slave to master or single (look at documentation picture on drive) and see if it boots.  See if cdrom works again.

XP should never see two hard drives at same time with xp on both of them.  Eventually leads to corruption.  But if you become satisfied with your new one, then at that point you could connect the old one as well, copy off data files, then shut down and remove old drive (or reformat old drive to clear XP from it).
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mimi6723Author Commented:
yeah, the old one is still coming up with the error. How can I go into the old one from the new one and restore the hard drive?
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Expert4XPCommented:
Once the new hard drive is working and you're installed Windows XP fresh on it, connect the old drive as slave on the same ide cable.  You will be able to copy off data from the old one (like My Documents etc.).

You'll have to reinstall any software applications on your new XP on your new hard drive.
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mimi6723Author Commented:
Well everything is going pretty good. I am just having trouble getting dlink connected to my main pc. It won't connect to the router.
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Expert4XPCommented:
So, just to ask/clarify again:  Once you replaced your hard drive with a new one, now your diskette drive works and your cdrom drive works?
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mimi6723Author Commented:
yeah, it is all working. I just need to configure my router for my wireless internet. i also installed a floppy drive.... just in case. I am giving you the points since you were the only one that stuck with me and gave me the most options.
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Expert4XPCommented:
I'm glad it is working again.  Sometimes problems require trying lots of times just to narrow it down.  Bottom line sounds like your old hard drive was locking up the entire motherboard when it was connected.  Now that you have Windows XP functioning again, have you tried re-connecting your old hard drive as slave, just to be able to copy off your user data?  (I'm asking this with some caution because I don't think your system will startup with it connected, but who knows....You never said if you had critical documents or music etc on your old hard drive.)
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mimi6723Author Commented:
I reconnected the old hard drive and copied some files. Then I erased all data. It is my sons computer. He is 14 so nothing was critical. I am having one problem. Windows is running sooooo slow. I have REGISTRY MECHANIC. Do you think I should install it and check it. I don't understand why it would be running so slow. Have any suggestions?
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Expert4XPCommented:
Is your old hard drive still connected as well?  First step would be to disconnect the old drive and reboot and retest. I would wait on Registry Mechanic.  Mainly because you just installed a new fresh XP on a new blank hard drive, is that correct?

It's possible Windows is not using the correct high speed i/o method to your hard drive.

Look at My Computer/Hardware/Device Manager/IDE ATA Controllers/

Double click Primary IDE Channel, then Advanced Settings tab.  Make sure Current Transfer Mode says "Ultra DMA Mode n" and that it does NOT say PIO.

Do same for Secondary IDE Channel.

What is the configuration of your pc now?  That is, what is connected to the primary IDE ribbon cable?  What is connected to the secondary IDE ribbon cable?
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mimi6723Author Commented:
yes the old hard drive is still connected and XP is installed on the new hard drive.
Okay here are the results of the IDE controllers. Both are set to Ultra DMA 6- Ultra 133 with BIOS select transfer mode and enable write cashing checked. I ran tests on both and the results are

 Primary
theoretical limit- 133.3
Burst Speed 60.7
Sustained speed 35.7
 
 Secondary
theoretical limit- 133.3
Burst speed 66.3
Sustained speed 21.4

It seems a little quicker this morning. Could it be from running it all day? I wouldn't think it should matter. I have two fans inside it. I can turn up one of the fans. it has three selection and I think it is on the second spot. What do you think?
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mimi6723Author Commented:
It seems a little quicker this morning. Could it be from running it all day? I wouldn't think it should matter. I have two fans inside it. I can turn up one of the fans. it has three selection and I think it is on the second spot. What do you think?
The primary cable is the new hard drive and the secondary is the old one.
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Expert4XPCommented:
Have you reached a conclusion as to the reason for the initial failure?  The reason you couldn't boot at all?

If you suspect it is the old second hard drive, then I wouldn't use it.  Or were the jumper settings wrong on the old second drive?  It could be an intermittent problem that surfaced from your original post.

Don't ever try to boot from your old hard drive because if you do and it sees the new XP hard drive, it will corrupt your new one and you'll have to reinstall all over again.  Personally I would remove and reformat the old drive.

Air circulation is important; sounds like fans are ok.

Sounds though like your pc is working fine now.  
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mimi6723Author Commented:
I did reformat the old drive. It is set as backup storage. I don't know what caused the failure and I am scare to so automatic updates. I read alot of threads and many said it was during an update and or reload after an update. I think there is a specific update that causes it. But Microsoft web site said it could be 3 or 4 different things.
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Expert4XPCommented:
Even if the update caused a software problem, you also couldn't even boot the hard drive, and your motherboard would not boot from cd or diskette.  That indicates some hardware failure as well.  Could have been coincidence that they both occurred at the the same time.  It is hard to reconstruct past events, especially with a compicated problem that you went through.

I would take the old drive out of the pc for now just to be safe.  Just in case it was a contributing factor.  With it in the PC, you were unable to boot from diskette or cdrom.  Only after you removed it and put in a new hard drive were you able to finally boot from the cdrom and thus reinstall XP.

You should be proud of your handiness.  You stuck in there longer than most customers.  (If I can't fix a plumbing problem in 15 minutes, I call the plumber!!  ha)

I'm glad it's working again now.
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mimi6723Author Commented:
Thank you, I really appreciate you sticking with me. It was so helpful to get advice and new things to try. Is there a way to check speed of the processor beside checking the BIOS?
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Expert4XPCommented:
Try this CPU Info utility.  It should match/confirm what your bios and cpu says:

http://cpuinfo.visualware.com/

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Expert4XPCommented:
One final note regarding your new installation of XP:  I understand you are fearful of updates, but you should install all the critical Windows Updates as a minimum.  Most of them are security related and stability related.
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Expert4XPCommented:
Mimi, thanks and good luck!!
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