ndis.sys access denied on XP home

Discussion in 'Malware Help (A Specialist Will Reply)' started by swinton, May 18, 2010.

  1. swinton

    swinton Private E-2

    AVG is telling me that ndis.sys is infected but that it won't do anything about it since it is a critical system file.

    Have tried to simply copy / paste with a good ndis.sys but no go as Access Denied is the response from XP Home. Have tried attrib -r -s -h but still no go. Have booted into safe mode and still Access Denied.

    Have looked at Task Manager and tried to end smss and lsass and was denied; can only guess that it is one of the svchosts.

    What is the standard way to replace ndis.sys on XP Home (SP2) ?
     
  2. Kestrel13!

    Kestrel13! Super Malware Fighter - Major Dilemma Staff Member

    Best thing to do would be for you to follow our malware removal procedures. :)

    Welcome to Major Geeks!

    Please read ALL of this message including the notes before doing anything.

    Pleases follow the instructions in the below link:

    READ & RUN ME FIRST. Malware Removal Guide


    and attach the requested logs when you finish these instructions.
    • **** If something does not run, write down the info to explain to us later but keep on going. ****
    • Do not assume that because one step does not work that they all will not. MGtools will frequently run even when all other tools will not.

    • After completing the READ & RUN ME and attaching your logs, make sure that you tell us what problems still remain ( if any still do )!
    Helpful Notes:

    1. If you run into problems trying to run the READ & RUN ME or any of the scans in normal boot mode, you can run the steps in safe boot mode but make sure you tell us what you did later when you post logs. See the below if you do not know how to boot in safe mode:
    2. If you have problems downloading on the problem PC, download the tools and the manual updates for SUPERAntiSpyware and Malwarebytes ( links are given in the READ & RUN ME) onto another PC and then burn to a CD. Then copy them to the problem PC. You will have to skip getting updates if (and only if) your internet connection does not work. Yes you could use a flash drive too but flash drives are writeable and infections can spread to them.
    3. If you cannot seem to login to an infected user account, try using a different user account (if you have one) in either normal or safe boot mode and running only SUPERAntiSpyware and Malwarebytes while logged into this other user account. Then reboot and see if you can log into the problem user account. If you can then run SUPERAntiSpyware, Malwarebytes, ComboFix and MGtools on the infected account as requested in the instructions.
    4. To avoid additional delay in getting a response, it is strongly advised that after completing the READ & RUN ME you also read this sticky:
    Any additional post is a bump which will add more delay. Once you attach the logs, your thread will be in the work queue and as stated our system works the oldest threads FIRST.
     

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