Why does Powershell return an error for Get-MpComputerStatus ?  

  1. Posts : 370
    Win10 32bit v20H2

    Why does Powershell return an error for Get-MpComputerStatus ?

    Instead it returns
    "Get-MpComputerStatus : The extrinsic Method could not be executed. at line:1 char:1
    + Get-MpComputerStatus
    + ~~~~~~~~~~~~~~~~~~~~~~~~~
    + Categorylnfo : MetadataError: (MSFT_HpComputerStatus:ROOT\Microsoft\...pComputerStatus) [Get-MpComputer Status], CimException
    + FullyQualiFiedErrorId : MI RESULT 16,6et-MpComputerStatus.
      My Computer

  2. Posts : 14,008
    Windows 11 Pro X64 22H2 22621.1848

    Works fine for me:

    PS C:\Users\ztruk> Get-MpComputerStatus
    AMEngineVersion                 : 1.1.15400.5
    AMProductVersion                : 4.18.1810.5
    AMServiceEnabled                : True
    AMServiceVersion                : 4.18.1810.5
    AntispywareEnabled              : True
    AntispywareSignatureAge         : 0
    AntispywareSignatureLastUpdated : 11/26/2018 4:10:03 PM
    AntispywareSignatureVersion     : 1.281.893.0
    AntivirusEnabled                : True
    AntivirusSignatureAge           : 0
    AntivirusSignatureLastUpdated   : 11/26/2018 4:10:04 PM
    AntivirusSignatureVersion       : 1.281.893.0
    BehaviorMonitorEnabled          : True
    ComputerID                      : 148D0B73-2782-48B0-9841-C8B95255B416
    ComputerState                   : 0
    FullScanAge                     : 120
    FullScanEndTime                 : 7/29/2018 8:32:04 PM
    FullScanStartTime               : 7/29/2018 8:31:08 PM
    IoavProtectionEnabled           : True
    LastFullScanSource              : 1
    LastQuickScanSource             : 2
    NISEnabled                      : True
    NISEngineVersion                : 1.1.15400.5
    NISSignatureAge                 : 0
    NISSignatureLastUpdated         : 11/26/2018 4:10:04 PM
    NISSignatureVersion             : 1.281.893.0
    OnAccessProtectionEnabled       : True
    QuickScanAge                    : 0
    QuickScanEndTime                : 11/26/2018 2:31:39 AM
    QuickScanStartTime              : 11/26/2018 2:29:27 AM
    RealTimeProtectionEnabled       : True
    RealTimeScanDirection           : 0
    PSComputerName                  :
    I have Win 10 Pro X64 Ver 1809 Build 17763.134 (as reported by winver).
      My Computers

  3. Posts : 370
    Win10 32bit v20H2
    Thread Starter

    Good for Ztruker.

    How can I also get that result ? It should not depend on the version - I am still running v1803, since there is NO sign of it updating to v1809. I have two systems - one 32bit and one 64bit - they BOTH return that error.
      My Computer

  4. Posts : 809

    It looks like this depends on Defender being active. Do you have another anti-malware installed?
      My Computer

  5. Posts : 370
    Win10 32bit v20H2
    Thread Starter

    why Powershell error ?

    Yes, I have AVAST, but had disabled it.
    On the x64 v1803, I had tried to disable Defender because it was attacking files I wanted to run. Hence my interest in Powershell. With both Avast & Defender disabled, PUPs are still being prevented from running.

    In the v1803 x32, I have Avast running, which I believe disables Defender.
      My Computer

  6. Posts : 4,224
    Windows 10

    I can confirm presence of Defender makes a difference on my machines. I get the same error as the OP on my production PC where I run NIS. I get the same kind of output on my Lenovo T520 as @Ztruker because that machine has always and only run Defender. Interesting!
      My Computers

  7. Posts : 13,164
    Win10 Version 21H2 Pro and Home, Win11 Pro and Home

    Works fine for me using PowerShell as Admin on latest Win10 with Windows Defender running.
    Attachment 215394
      My Computers

  8. Posts : 14,008
    Windows 11 Pro X64 22H2 22621.1848

    Found this: How to use PowerShell to investigate Windows Defender's malware signature definitions database

    The 12 Defender cmdlets are described in this table.
    Cmdlet Description
    Add-MpPreference Modifies settings for Windows Defender.
    Get-MpComputerStatus Gets the status of anti-malware software on the computer.
    Get-MpPreference Gets preferences for the Windows Defender scans and updates.
    Get-MpThreat Gets the history of threats detected on the computer.
    Get-MpThreatCatalog Gets known threats from the definitions catalog.
    Get-MpThreatDetection Gets active and past malware threats that Windows Defender detected.
    Remove-MpPreference Removes exclusions or default actions.
    Remove-MpThreat Removes active threats from the computer.
    Set-MpPreference Configures preferences for Windows Defender scans and updates.
    Start-MpScan Starts a scan on the computer.
    Start-MpWDOScan Starts a Windows Defender offline scan.
    Update-MpSignature Updates the anti-malware definitions on the computer.
    That seems to indicate these are Defender specific Cmdlets.
      My Computers

  9. Posts : 370
    Win10 32bit v20H2
    Thread Starter

    So Powershell should report the status of those cmdlets, rather than return an error message.
      My Computer


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