___PowerShell-Functions/Get-PendingReboot.ps1 at master · joshburkard/___PowerShell-Functions · GitHub

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<#
    .SYNOPSIS
        This script returns the pending reboot state of the local system

    .DESCRIPTION
        This script returns the pending reboot state of the local system by checking several registry settings

        for details see the post from Adam Bertram at https://adamtheautomator.com/pending-reboot-registry/

    .LINK
        https://adamtheautomator.com/pending-reboot-registry/

    .EXAMPLE
        .\Get-PendingReboot.ps1

#>

function Test-RegistryKey {
    [OutputType('bool')]
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory)]
        [ValidateNotNullOrEmpty()]
        [string]$Key
    )

    $ErrorActionPreference = 'Stop'

    if (Get-Item -Path $Key -ErrorAction Ignore) {
        $true
    }
}

function Test-RegistryValue {
    [OutputType('bool')]
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory)]
        [ValidateNotNullOrEmpty()]
        [string]$Key,

        [Parameter(Mandatory)]
        [ValidateNotNullOrEmpty()]
        [string]$Value
    )

    $ErrorActionPreference = 'Stop'

    if (Get-ItemProperty -Path $Key -Name $Value -ErrorAction Ignore) {
        $true
    }
}

function Test-RegistryValueNotNull {
    [OutputType('bool')]
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory)]
        [ValidateNotNullOrEmpty()]
        [string]$Key,

        [Parameter(Mandatory)]
        [ValidateNotNullOrEmpty()]
        [string]$Value
    )

    $ErrorActionPreference = 'Stop'

    if (($regVal = Get-ItemProperty -Path $Key -Name $Value -ErrorAction Ignore) -and $regVal.($Value)) {
        $true
    }
}

$tests = @(
    { Test-RegistryKey -Key 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootPending' }
    { Test-RegistryKey -Key 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootInProgress' }
    { Test-RegistryKey -Key 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired' }
    { Test-RegistryKey -Key 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing\PackagesPending' }
    { Test-RegistryKey -Key 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\PostRebootReporting' }
    { Test-RegistryValueNotNull -Key 'HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager' -Value 'PendingFileRenameOperations' }
    { Test-RegistryValueNotNull -Key 'HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager' -Value 'PendingFileRenameOperations2' }
    {
        # Added test to check first if key exists, using "ErrorAction ignore" will incorrectly return $true
        'HKLM:\SOFTWARE\Microsoft\Updates' | Where-Object { test-path $_ -PathType Container } | ForEach-Object {
            (Get-ItemProperty -Path $_ -Name 'UpdateExeVolatile' | Select-Object -ExpandProperty UpdateExeVolatile) -ne 0
        }
    }
    { Test-RegistryValue -Key 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce' -Value 'DVDRebootSignal' }
    { Test-RegistryKey -Key 'HKLM:\SOFTWARE\Microsoft\ServerManager\CurrentRebootAttemps' }
    { Test-RegistryValue -Key 'HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon' -Value 'JoinDomain' }
    { Test-RegistryValue -Key 'HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon' -Value 'AvoidSpnSet' }
    {
        # Added test to check first if keys exists, if not each group will return $Null
        # May need to evaluate what it means if one or both of these keys do not exist
        ( 'HKLM:\SYSTEM\CurrentControlSet\Control\ComputerName\ActiveComputerName' | Where-Object { test-path $_ } | foreach-object { (Get-ItemProperty -Path $_ ).ComputerName } ) -ne
        ( 'HKLM:\SYSTEM\CurrentControlSet\Control\ComputerName\ComputerName' | Where-Object { Test-Path $_ } | foreach-object { (Get-ItemProperty -Path $_ ).ComputerName } )
    }
    <#
    {
        # Added test to check first if key exists
        'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Services\Pending' | Where-Object {
            (Test-Path $_) -and (Get-ChildItem -Path $_) } | ForEach-Object { $true }
    }
    #>
)

$res = $false
foreach ($test in $tests) {
    Write-Verbose "Running scriptblock: [$($test.ToString())]"
    if (& $test) {
        $res = $true
        break
    }
}

return $res