Powershell, Windows knowhow, Windows Scripts

Windows: Powershell script to fix and repair WMI

6 Comments

Hi,

this script repairs and recreates the WMI Repository of a Windows. For example, this occurs sometimes if you clone a Windows machine with an installed SCCM/SMS Client. The typical error in this case is “Failed to open to WMI namespace ‘\\.\root\CCM\SoftwareUpdates\DeploymentAgent’ (8007045b)”

Lasts start. Start a Powershell console as Administrator. Stop all services. Sometimes other services depends on the WMI Service and does not accept a stop request. Therefore you cannot stop the WMI service. TrendMicro Office is such a service. You have to kill them by TaskManager.

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# Stop WMI
# Only if SCCM/SMS Client is installed. Stop ccmexec.
Stop-Service -Force ccmexec -ErrorAction SilentlyContinue
Stop-Service -Force winmgmt

(Re)Register WMI binary components

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[String[]]$aWMIBinaries=@("unsecapp.exe","wmiadap.exe","wmiapsrv.exe","wmiprvse.exe","scrcons.exe")
foreach ($sWMIPath in @(($ENV:SystemRoot+"\System32\wbem"),($ENV:SystemRoot+"\SysWOW64\wbem"))){
    if(Test-Path -Path $sWMIPath){
        push-Location $sWMIPath
        foreach($sBin in $aWMIBinaries){
            if(Test-Path -Path $sBin){
                $oCurrentBin=Get-Item -Path  $sBin
                Write-Host " Register $sBin"
                & $oCurrentBin.FullName /RegServer
            }
            else{
                # Warning only for System32
                if($sWMIPath -eq $ENV:SystemRoot+"\System32\wbem"){
                    Write-Warning "File $sBin not found!"
                }
            }
        }
        Pop-Location
    }
}

Reregister WMI Managed Objects

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if([System.Environment]::OSVersion.Version.Major -eq 5)
{
   foreach ($sWMIPath in @(($ENV:SystemRoot+"\System32\wbem"),($ENV:SystemRoot+"\SysWOW64\wbem"))){
        if(Test-Path -Path $sWMIPath){
            push-Location $sWMIPath
            Write-Host " Register WMI Managed Objects"
            $aWMIManagedObjects=Get-ChildItem * -Include @("*.mof","*.mfl")
            foreach($sWMIObject in $aWMIManagedObjects){
                $oWMIObject=Get-Item -Path  $sWMIObject
                & mofcomp $oWMIObject.FullName             
            }
            Pop-Location
        }
   }
   if([System.Environment]::OSVersion.Version.Minor -eq 1)
   {
        & rundll32 wbemupgd,UpgradeRepository
   }
   else{
        & rundll32 wbemupgd,RepairWMISetup
   }
}
else{
    # Other Windows Vista, Server 2008 or greater
    Write-Host " Reset Repository"
    & ($ENV:SystemRoot+"\system32\wbem\winmgmt.exe") /resetrepository
    & ($ENV:SystemRoot+"\system32\wbem\winmgmt.exe") /salvagerepository
}

Starting services

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Start-Service -Force winmgmt
Start-Service -Force ccmexec -ErrorAction SilentlyContinue

Michael

Update 04/04/2014: Modified the script. From now, no more WMI queries are done by the script. The OS version is determined by the System.Environent class.

6 thoughts on “Windows: Powershell script to fix and repair WMI”

  1. Thanks for this script, but I’m having trouble even running it on my windows 2008 host.

    AuthorizationManager check failed.
    At line:1 char:13
    + .\fixwmi.ps1 <<<<
    + CategoryInfo : NotSpecified: (:) [], PSSecurityException
    + FullyQualifiedErrorId : RuntimeException

    I had the execution policy set to remote-signed, but now get-execution policy throws an error.

    Get-ExecutionPolicy :
    At line:1 char:20
    + Get-ExecutionPolicy <<<<
    + CategoryInfo : NotSpecified: (:) [Get-ExecutionPolicy], COMException
    + FullyQualifiedErrorId : System.Runtime.InteropServices.COMException,Microsoft.PowerShell.Commands.GetExecutionPo
    licyCommand

    I've heard this is because of WMI being broken, but I can't use your script.

    1. Hi John, try the new updated script V1.1. I’ve replaced all WMI queries to determine the OS version with .NET System.Environment function calls.

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