Windows 10: i cant start windows defender after a virus on my pc error 0x800700aa Solved

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  1. Posts : 3,299
    10.5 Home 1803 x64
       06 Sep 2017 #11

    Run "Enable WD" as admin and restart. If services report access denied, run it in safe mode.
    i cant start windows defender after a virus on my pc error 0x800700aa Attached Files
      My ComputerSystem Spec

  2.    06 Sep 2017 #12

    didint work in safe mode or regular
    TairikuOkami said: View Post
    Run "Enable WD" as admin and restart. If services report access denied, run it in safe mode.
      My ComputerSystem Spec

  3.    06 Sep 2017 #13

    Fixed! the issue was a virus installed driver called "mouybfil.sys" booting to microsoft DART or using a linux distro and manually going to C:\Windows\System32\drivers\ and removing the driver fixed the issue a and the virus is gone
      My ComputerSystem Spec


  4. Posts : 8,090
    10 Home x64 (1803) (10 Pro on 2nd pc)
       06 Sep 2017 #14

    Bree said: View Post
    Seems you did not in fact get everything out.
    xdarkmario said: View Post
    Fixed! the issue was a virus installed driver called "mouybfil.sys" ... removing the driver fixed the issue a and the virus is gone
    Seems like you have now :)

    Well done!
      My ComputersSystem Spec

  5.    06 Sep 2017 #15

    In all my years of manually removing viruses I haven't seen a driver based virus before. Antiviruses can't detect it ether
      My ComputerSystem Spec

  6.    07 Sep 2017 #16

    Maybe it's some sort of rootkit.
      My ComputerSystem Spec


 
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