Alright well I just got most of my virus problems fixed two days ago, although not all of them so viruses may be a possibility, but anyway here is the exact problem I am having:

STOP: c000021a {Fatal System Error}

The windows logon process system process terminated unexpectedly with a status of 0xc0000005 (0x00000000 0x00000000).
The System has been shut down.

Safe Mode and Last Good Configuration return the same error message.
I have no ASR Floppy before I installed SP3.
I do have the Windows CD along with Windows Recovery Installed.

Windows XP Professional Service Pack 2/3 (I guess 3 unless it didn't work, then I guess I have 2)

Hi hope this helps Your Computer Restarts Unexpectedly When You Press CTRL+ALT+DELETE to Unlock Your Computer

Umm, no that did not help at all. I am pretty certain that although I am experiencing the same error message that this is a completly different problem.

Do you have a windows XP cd? The first option would be to do a repair install of the O/S if you don't have an XP cd your really stuck not much we can do.

I have the windows cd however the setup cd doesn't recognize that I have a previous installation of windows so i can't do a repair installation of windows.

Can you get into into recovery console - if so try the following:

1. Press R for "to repair a windows installation using Recovery Console"
2. Type in number for windows installation you want to log onto - is usually 1 > press enter
3. Enter the administrator password.
4. Change to configuration folder type: cd c:\system32\config
5. Backup your configuration by typing the following to rename the files: (don't type the word "type" or the :
type: ren default default.bak
type: ren sam sam.bak
type: ren system system.bak
type: ren software software.bak
type: ren security security.bak

6. Type cd\ or c:\
7. Type cd "system volume information" (you must include punctuation marks)
8. Type DIR
9. Change the directory into the restore folder that will have a long name similar to the to the following:_restore{987E0331-0f01-427.......
Type cd _restore{987E0331-0f01-427......} (don't forget the space in between the cd and the underscore)
10. Type DIR
11. Select the rp directory with the latest date before your computer wouldn't start - e.g. rp214
Type cd rp214
12. Type cd snapshot
13. Copy and rename the files to the system32/config folder by typing the following:
type: copy _REGISTRY_USER_.DEFAULT c:\windows\system32\config\default
type: copy _REGISTRY_MACHINE_SAM c:\windows\system32\config\sam
type: copy _REGISTRY_MACHINE_SECURITY c:\windows\system32\config\security
type: copy _REGISTRY_MACHINE_SOFTWARE c:\windows\system32\config\software
type: copy _REGISTRY_MACHINE_SYSTEM c:\windows\system32\config\system
14. Type EXIT



Hopefully it will boot without bluescreen.

If you do not have access to "system volume information" post back.