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Fatal System Error c000021a


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#1
leo_00

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Over the last week or so, I've been getting the follwoing error message along with a blue screen, when I am logging off from my computer:

STOP: c000021a {fatal system error}
Windows login process system terminated unexpectedly with a status of oxc0000005. System has been shut down.

Background:
I've had this OS and computer for ~3yrs now.
SP2 installed ~ 6 months ago.
IE 7 installed ~ 1 month ago.
I cant seem to recall any other relevant thing that may have lead to this.
I have already run a full Symantec Antivirus Scan and a Webroot Spy Sweeper and both scans were completely clean.

How did this suddenly happen ?? How can I fix this ??

Any help would be much appreciated ! Thank you,

Leo
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#2
b1caez01

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Make a quick list of what you can do...from turning on the computer to accessing your desktop...
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#3
piper

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Here's a link with some troubleshooting information for your error: http://win-xp-sp.blo...em-process.html

Is there any other software, hardware, and/or hardware drivers you might have installed just prior to getting the blue screen?

You could also try SFC (System File Checker)
It can fix certain issues in Windows where specific system files get corrupted, deleted, or infected. Basically the System File Protection watches the system files and checks their integrity against it's knowledge of what these files are supposed to look like. Generally if a system file get's "messed with" windows will let you know and give you the option to dissallow the change, sometimes you don't get this option though. The System File Checker is a command line utility that will initiate a scan of all the system files to make sure they are in their original state, present on the system, and or working properly. It's an easy tool to use but the user HAS to have an XP disk for it to work.

Do you have a valid XP cd?

If so, place it in your CD ROM drive and follow the instructions below

Start > Run > cmd then type

sfc /scannow (note the space)

let this run untill you get a message saying it is complete.

SFC - system file checker, retrieves the correct version of the file from %Systemroot%\System32\Dllcache or the Windows installation source files, and then replaces the incorrect file.

If you want to see what was replaced, right click My Computer > manage, expand event viewer > system.
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#4
leo_00

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b1caez01 and Linda: thanks!

b1caez01's post got me thinking further ....

It seems that this problem maybe associated with another problem that I’ve recently started having while exiting my MSN dial-up connection: my phone does not disconnect! This is a recent problem that I think started at the same time. Plus, the Windows close-down problem only occurs after the MSN phone problem .....

I called MSN support, spent ~1hr on the phone and basically got NO help !!

I then ran the SFC - on checking the log, I found out that some system files had been updated.
Even after doing this, the problem has recurred at least one more time ...! Any input??
Thanks again.
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#5
piper

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You could uninstall MSN altogether to confirm it's the culprit.

Also, be sure you have the most current drivers for your modem.
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