i cant start windows defender after a virus on my pc error 0x800700aa

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  1. Posts : 5,443
    Windows 11 Home
       #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 Computer


  2. Posts : 261
    Windows 10 Enterprise
    Thread Starter
       #12

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


  3. Posts : 261
    Windows 10 Enterprise
    Thread Starter
       #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 Computer


  4. Posts : 31,480
    10 Home x64 (22H2) (10 Pro on 2nd pc)
       #14

    Bree said:
    Seems you did not in fact get everything out.
    xdarkmario said:
    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 Computers


  5. Posts : 261
    Windows 10 Enterprise
    Thread Starter
       #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 Computer


  6. Posts : 2,935
    Windows 10 Home x64
       #16

    Maybe it's some sort of rootkit.
      My Computer


 

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