79 lines
3.7 KiB
PowerShell
79 lines
3.7 KiB
PowerShell
# Guard to exit script if WMI does not appear to be installed at all
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If ( !(Test-Path "${Env:SystemRoot}\System32\wbem") )
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{ Write-Error "WMI components are not present on this device. Please install them manually." ; Exit }
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# Function to test if WMI is functioning correctly
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Function Verify-WMIFunctionality {
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# Track the number of failed functionality tests
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$WMIErrorLevel = 0
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# Specify the WMI class name to query
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$Class = 'Win32_OperatingSystem'
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# Specify a property in the WMI class that we can test for a value
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$Property = 'LastBootUpTime'
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# Test that our property has a value, and that the WBEM folder exists.
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If ( $(Get-CimInstance -ClassName $Class -ErrorAction SilentlyContinue | Select-Object $Property -ErrorAction SilentlyContinue).$Property -eq $null )
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{ Write-Error "Failed to query ${Class} for the value of ${Property}" ; $WMIErrorLevel++ }
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# Test that the WMI repository is consistent
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$WMIRepoStatus = (winmgmt.exe /verifyrepository)
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If ( ($WMIRepoStatus -contains "inconsistent") -or ($WMIRepoStatus -contains "failed" ) )
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{ Write-Error "WMI repository is in an inconsistent state" ; $WMIErrorLevel++ }
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If ( $WMIErrorLevel -eq 0 ) { Return $true } Else { Return $false }
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}
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# Guard to exit script if no repair is necessary
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If ( Verify-WMIFunctionality ) { Exit }
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Write-Output "Attempting to salvage WMI repository"
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# Attempt to salvage WMI repository and exit script if no further repair is necessary
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$WMIRepoSalvage = (winmgmt.exe /salvagerepository)
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If ( !($WMIRepoSalvage -contains "failed") -and (Verify-WMIFunctionality) ) { Exit }
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Write-Error "Failed to salvage WMI repository"
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Try {
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Write-Output "Attempting manual reinitialization of WMI"
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# Disable and stop the winmgmt service
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Write-Output "Stopping and disabling WMI service"
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Set-Service -Name winmgmt -StartupType Disabled
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Stop-Service -Name winmgmt -Force
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# Set the WBEM directory for manual refresh of WMI components
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$TargetDir = "${Env:WinDir}\System32\wbem"
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# Rename the Repository directory to Rep_bak
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If ( Test-Path "${TargetDir}\Rep_bak" ) { Remove-Item "${TargetDir}\Rep_bak" -Recurse -Force -ErrorAction SilentlyContinue }
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If ( Test-Path "${TargetDir}\Repository" ) { Rename-Item -Path "${TargetDir}\Repository" -NewName "${TargetDir}\Rep_bak" -Force }
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# Register all *.dll files
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Write-Output "Registering all DLL files in ""${TargetDir}"""
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$WMIDlls = Get-ChildItem -Path "${TargetDir}\*" -File -Include *.dll
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ForEach ( $dll in $WMIDlls ) { $path = $dll.FullName ; Start-Process "regsvr32.exe" -ArgumentList "/s ""${path}""" -Wait }
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#Register all *.exe files
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Write-Output "Registering all EXE files in ""${TargetDir}"""
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$WMIExes = Get-ChildItem -Path "${TargetDir}\*" -File -Include *.exe | Where { ($_.BaseName.ToLower() -ne "wbemcntl") -and ($_.BaseName.ToLower() -ne "wbemtest") -and ($_.BaseName.ToLower() -ne "mofcomp") }
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ForEach ( $exe in $WMIExes ) { $path = $exe.FullName ; Start-Process $path -ArgumentList "/regserver" -Wait }
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# Register all *.mof and *.mfl files
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Write-Output "Compiling all MOF and MFL files in ""${TargetDir}"""
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$WMIMofs = Get-ChildItem -Path "${TargetDir}\*" -File -Include *.mof,*.mfl
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ForEach ( $mof in $WMIMofs ) { $path = $mof.FullName ; Start-Process "${TargetDir}\mofcomp.exe" -ArgumentList """${path}""" -Wait }
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}
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Catch { Write-Error $_.Exception.Message }
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Finally {
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# Start the winmgmt service
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Set-Service -Name winmgmt -StartupType Automatic
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Start-Service -Name winmgmt
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}
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# Final test of WMI
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If ( !(Verify-WMIFunctionality) ) { Write-Output "WMI repair failed. Please restart this device and run this script again." } |