Windows 8 and 8.1 Forums


Windows malicious software stopped working

  1. #1


    Posts : 187
    Windows 8.1 Pro/ Windows 8 Enterprise

    Windows malicious software stopped working


    Hi, after installing Windows Malicious Software Removal Tool for Windows 8.1 - February 2014 (KB890830) every time I start my computer in the Action center - reliability history there`s an error:
    How can I solve this problem? Thanks for your help!
    Click image for larger version

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  2. #2


    Posts : 1,360
    Windows 8.1 Enterprise
      My System SpecsSystem Spec

  3. #3


    Posts : 2,191
    Windows 8.1


    Hello werty,

    The information you provided indicates the following:

    MRT.exe is the Malicious Software Removal Tool (latest version). The mpgear.dll is the module causing the issue. It is supposed to be a valid dll that is signed by MS but I can't find what program is using it because it is not present on my Win 8.1 x64 PC. Maybe it is a file that is used by Windows Defender (because I have defender disabled)? I'm guessing that the Malicious Software Removal Tool is respawning a new request (at each startup) in an attempt to complete the unfinished scan (just a guess). Now, according to this website, that mpgear.dll is a valid MS dll so I would check to make sure it is signed by MS (right click the dll and check for signature). However, if it is not signed by MS then it could be malware. At this time, I cannot offer any fix because you need to verify that mpgear.dll is a valid MS dll. See here for more information:

    Malware scan of MpGear.dll (Microsoft Malware Protection) de90878932bf40c9232268f2815a2833be076d17 - herdProtect
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  4. #4


    Posts : 187
    Windows 8.1 Pro/ Windows 8 Enterprise


    I checked and it is signed by Microsoft and I also downloaded a fresh copy from the Microsoft download center but to no avail. Another failure today after the automatic maintenance finished. Another suggestions?
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  5. #5


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    MRT.exe = spyware.

    Best to never install that when doing WU. Uncheck it.
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  6. #6


    Try running a SFC /Scannow to see if there are any problems in your system that need repaired.

    SFC /SCANNOW Command - Run in Windows 8

    Try d/l ing from here (save to desktop), r click & run as administrator.

    Download Malicious Software Removal Tool from Official Microsoft Download Center

    If you still have problems, there may be temp files that need to be cleaned out. You can either run MS's built in disk cleanup or d/l CCleaner.

    Disk Cleanup - Open and Use - Windows 7 Help Forums

    https://www.piriform.com/ccleaner/download

    Another good tool is TFC, although I have not used it on Win 8 so I am unsure if it will work (anyone out there used it on 8 yet?)

    TFC Download
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  7. #7


    Posts : 187
    Windows 8.1 Pro/ Windows 8 Enterprise


    Unfortunatelly today another error relating to mpgear.dll
    Last edited by werty; 23 Feb 2014 at 13:43.
      My System SpecsSystem Spec

  8. #8


    Posts : 43
    Windows 8.1 Pro 32-bit


    Quote Originally Posted by werty View Post
    Unfortunatelly today another error relating to mpgear.dll
    Hi Werty,

    I get the same error in the Windows 8.1 Event Viewer as Event 1000 Application error:
    Faulting application name: MRT.exe, version: 5.9.9902.0, time stamp: 0x52f1a7d9
    Faulting module name: mpgear.dll, version: 1.1.1224.0, time stamp: 0x528c12f6
    Exception code: 0xc0000005
    Fault offset: 0x0001b48a
    Faulting process id: 0x22c
    Faulting application start time: 0x01cf31980937a6b2
    Faulting application path: C:\WINDOWS\system32\MRT.exe
    Faulting module path: C:\WINDOWS\Temp\mpgear.dll
    Report Id: 4a4345c8-9d8b-11e3-b729-0019d138fd8e
    Faulting package full name:
    Faulting package-relative application ID:

    It doesn't happen on every boot, but usually once a day. Seems to happen a few minutes after automatic maintenance is performed, according to the time stamp. Tried the above suggestions, but no joy.
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  9. #9


    Posts : 1,883
    7601.18247.x86fre.win7sp1


    You likely have some kind of malware causing that to happen. It's a good guess anyway.

    Have you scanned with Malwarebytes and ADWCleaner?

    If some nasty stuff is found, use Killdisk on the drive to wipe it entirely clean.

    This means "access violation" - Exception code: 0xc0000005 - Maybe malware protecting itself.
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  10. #10


    Posts : 43
    Windows 8.1 Pro 32-bit


    Quote Originally Posted by MasterChief View Post
    You likely have some kind of malware causing that to happen. It's a good guess anyway.

    Have you scanned with Malwarebytes and ADWCleaner?

    If some nasty stuff is found, use Killdisk on the drive to wipe it entirely clean.

    This means "access violation" - Exception code: 0xc0000005 - Maybe malware protecting itself.
    Nah, it's not malware. Both MRT.exe and mpgear.dll scanned with Hitman Pro, MalwareBytes and Webroot.
    Also, the digital signatures and hashes match Microsoft's information. They are part of Microsoft's Malicious Software Removal Tool.
    Started happening just after the February updates, so it may go away when the March updates come out.
      My System SpecsSystem Spec

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