Stop: c000021a {Fatal System Error} help

By kreeus
Oct 22, 2008
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  1. I use Windows XP. I somehow got the vundo.gen.k Trojan.

    McAfee Total Protection was not able to remove it.

    I downloaded Spybot S&D, also no help.

    I downloaded Avast! free antivirus. That worked, but seemed to make my computer run slowly. So I uninstalled Avast! and Spybot S&D. Now I cannot logon to my computer. When I trun on my computer I get this message:

    Floppy diskette seek failure Strike F1 key to continue, F2 to run the setup utility


    When I hit the F1 key, I get the blue screen:

    The Windows Logon Process system process terminated unexpectedly with a Status of 0x00000000 (0x00000000 0x00000000). The system has been shut down.


    Please help!


    I cannot logon in safe mode, either.
  2. gbhall

    gbhall TechSpot Chancellor Posts: 2,328   +49

    http://webtoolsandtips.com/remove-trojan/how-to-remove-trojanvundo-uninstall-vundogeng-free/ describes why you cannot boot in any mode without the virus also loading. I am not necessarily recommending you take the link on that site to download the claimed remover. Some of these links can easily download complete trouble themselves.

    You first need to create a bootable CD with as much of the removal programs on it as you can find. Now a bootable CD cannot be infected, so at least you will be able to manually delete any of the files listed in the above link. That is a start. Then go to the forum 'security and the Web' on this site and start following the links.
  3. kreeus

    kreeus Newcomer, in training Topic Starter

    I am pretty sure that AVAST! did remove the virus. It wasn't until after I had unistalled AVAST! and SPYBOT S&D, that my computer gave me the Fatal Error message.
  4. gbhall

    gbhall TechSpot Chancellor Posts: 2,328   +49

    You may well be mistaken. I have often found that anti-virus packages cheerfully claim to have removed the infection - and so they have - mostly. But the infection has not been cleared from certain start-up files and simply re-appears again at the next boot. I repeat the PC must be booted from uninfected start files in order that appropriate disinfectant programs can deal with the hidden menace.

    Try this link for more details http://wiki.castlecops.com/Vundo_Rootkit_Detection_and_Removal_Procedure

    Also google for 'vundo', there is lots of advice available.

    If you are convinced the actual infection is gone, but your PC is still not back to normal, try replacing any system files which have been damaged or altered. This link here http://support.microsoft.com/kb/310747 gives full instructions for that.
  5. almcneil

    almcneil TechSpot Guru Posts: 1,554

    Whether AVAST actually removed the virus or not makes little difference now as you cannot boot. The first course of action would be a Windows XP repair.
  6. Quantex_rox

    Quantex_rox Newcomer, in training Posts: 152

    Avast and spybot S+D seem to be getting worse and worse. I find that after i ran both, then ran Malewarebytes, malewarebytes would pick up a lot of things they didn't.
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