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XP - BSOD Stop:c000021a {fatal system error}

By monton
Apr 25, 2011
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  1. After removing a slew of trojens and other malware my friends computer gets the BSOD

    DELL Inspiron 1200 XP Home SP3

    Stop:c000021a {fatal system error}
    The Windows logon Process system process Terminated unexpectedly with a status of 0xc0000005 (0x00000000 0x00000000)

    Have not been able to get past this. Is there a way to fix this? I'd just as soon reinstall windows but my friend is balking at the idea. I've pulled the hard drive and run scans for malware and file system. Still won't get past this BSOD on reinstall.

    Any thoughts? I'd appreciate any suggestions.
  2. Mark56

    Mark56 TechSpot Paladin Posts: 1,889

    The file system has been damaged by the Malware infection. You can run a Repair install by booting from the XP disc but this will not remove any remaining Malware if you have not got the system completely clean. Follow this guide to run the Repair.


    On the other hand you could start a thread in the Malware forum and get help to be sure the system is clean but the only full proof method of getting a clean system again is to do, as you have suggested to your friend, a format and clean install.

    What anit virus software have you used?
  3. monton

    monton TS Booster Topic Starter Posts: 113

    She had webroot installed and I ran that. After the BSOD I haven't been able to access the drive. I pulled it and attached it to another computer via USB. I ran super antispyware and found a few more trojans. I also ran Avast and found 2 more. I'm uncertain if the malware was removed because a reboot is required and it is not the boot drive. Back in it's computer - just the BSOD. I tried a repair with an XP Pro disk (it has XP home) and it asked for an administrator password. My friend gave me the password - didn't work of course so I haven't gotten passed that.
  4. Mark56

    Mark56 TechSpot Paladin Posts: 1,889

    You cannot run a Repair install with a different version of XP, as you have discovered, it also needs to be at the same service pack level or higher.

    The reboot would have been required to remove the Malware so without that it is most likely still active. Chances are that the Malware has corrupted the boot sector so even if removed the PC will still not boot and you need the correct OS disc to repair it. Best bet is to contact Dell to purchase Recovery Discs for that particular PC which will include all the correct drivers. You can then do a format and reinstall.

    The only chance you might have is to run a bootable anti virus disc which you will have to make on another PC. All the instructions are on the web site.


    If this cleans the PC then see if you can boot to the command prompt using the F8 key or whatever key the PC uses to get into boot options. Then I can give intructions to repair the boot sector, no promises this will work though considering the damage that the Malware may have done.

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