Help with Trojan:O97M/Mountsi.C!ml


  1. Posts : 19
    Windows 10 Pro (Bootcamp)
       #1

    Help with Trojan:O97M/Mountsi.C!ml


    This morning when I turned on my laptop I saw a red cross check mark on Windows Security icon. I clicked on it and under "Virus & threat protection" there was "threats found". I clicked on "Start actions" button but nothing seems to happen and then the whole Windows Security window closes. I open it again and I see a green tick and then changes automatically back to a red cross check.

    I click on "See threat details" and it says "No recent actions", and the Windows Security screen hangs and it shuts off itself.

    I open Windows Security again and click "See threat details" and I can see the details and then it closes itself automatically.

    And there is a high CPU usage by "Antimalware Service Executable" in the task manager, I restarted my laptop several times and still the same.

    Here are some screenshots with more information.

    Help with Trojan:O97M/Mountsi.C!ml-2021-10-25_12-14-21.jpgHelp with Trojan:O97M/Mountsi.C!ml-2021-10-25_12-15-31.jpgHelp with Trojan:O97M/Mountsi.C!ml-2021-10-25_12-22-57.jpgHelp with Trojan:O97M/Mountsi.C!ml-2021-10-25_12-23-17.jpgHelp with Trojan:O97M/Mountsi.C!ml-2021-10-25_12-23-31.jpg
      My Computer


  2. Posts : 841
    Win10 Version 21H2 19044.1348
       #2

    Try a scan with a different AV (Malwarebytes free edition, ESET online scanner or one of your choosing)

    Let us know the results.
      My Computer

  3. SIW2's Avatar
    Posts : 2,368
    trying to install win10
       #3

    And there is a high CPU usage by "Antimalware Service Executable" in the task manager
    Perhaps it is working to try and get rid of whatever it doesnt like.

    there are bootable av things available free from many 3rd party av programs.
      My Computer

  4. steve108's Avatar
    Posts : 16,387
    19041.1348 - 2004/20H1 Pro x64
       #4

    How to Run a Microsoft Defender Offline Scan in Windows 10 can try boot time scan with Windows Defender too. Maybe time to do this now.
      My Computer

  5. Paul Black's Avatar
    Posts : 15,118
    Win 10 Pro 64-bit v1909 - Build 18363 Custom ISO Install
       #5

    Hello @iMak,

    I would certainly try scanning your OS Offline. Microsoft Defender has come a long way in the last few years and is pretty good now . . .

    > How to Run a Microsoft Defender Offline Scan in Windows 10 - Option 2.

    I would also run a separate AV scan using your installed AV if you have one.

    Also, have a look at this => 18 Best Free On-Demand Virus Scanners

    I hope this helps.
      My Computer

  6. steve108's Avatar
    Posts : 16,387
    19041.1348 - 2004/20H1 Pro x64
       #6

    Option 1, 2, or 3 will all yield the same result
      My Computer


  7. Paul Black's Avatar
    Posts : 15,118
    Win 10 Pro 64-bit v1909 - Build 18363 Custom ISO Install
       #7

    steve108 said:
    Option 1, 2, or 3 will all yield the same result.
    Very true. I just used Option 2 as MY preference.
      My Computer


  8. Posts : 19
    Windows 10 Pro (Bootcamp)
    Thread Starter
       #8

    pericles said:
    Try a scan with a different AV (Malwarebytes free edition, ESET online scanner or one of your choosing)


    Let us know the results.
    I tried many software, Kaspersky TDSS killer, Malwarebytes, Trojan Killer, GridinSoft Anti-Malware, Spybot, Clamwin, HitmanPro, and non of them found any threats.
    I ended up formatting my laptop and installed a fresh Windows 11 Pro.

    Thanks.

    - - - Updated - - -

    Paul Black said:
    Hello @iMak,

    I would certainly try scanning your OS Offline. Microsoft Defender has come a long way in the last few years and is pretty good now . . .

    > How to Run a Microsoft Defender Offline Scan in Windows 10 - Option 2.

    I would also run a separate AV scan using your installed AV if you have one.

    Also, have a look at this => 18 Best Free On-Demand Virus Scanners

    I hope this helps.
    I wish I knew this earlier but after I tried many 3rd party softwares which non of them detected the threat, I ended up formatting and installing a fresh Windows 11 Pro. Thanks.
      My Computer


 

  Related Discussions
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 04:37.
Find Us




Windows 10 Forums