1. Function Get-PendingRebootStatus {
2. <#
3. .Synopsis
4.     This will check to see if a server or computer has a reboot pending.
5.     For updated help and examples refer to -Online version.
6.  
7. .NOTES
8.     Name: Get-PendingRebootStatus
9.     Author: theSysadminChannel
10.     Version: 1.2
11.     DateCreated: 2018-Jun-6
12.  
13. .LINK
14.     https://thesysadminchannel.com/remotely-check-pending-reboot-status-powershell -
15.  
16.  
17. .PARAMETER ComputerName
18.     By default it will check the local computer.
19.  
20. .EXAMPLE
21.     Get-PendingRebootStatus -ComputerName PAC-DC01, PAC-WIN1001
22.  
23.     Description:
24.     Check the computers PAC-DC01 and PAC-WIN1001 if there are any pending reboots.
25. #>
26.  
27.     [CmdletBinding()]
28.     Param (
29.         [Parameter(
30.             Mandatory = $false,
31.             ValueFromPipeline = $true,
32.             ValueFromPipelineByPropertyName = $true,
33.             Position=0
34.         )]
35.  
36.     [string[]]  $ComputerName = $env:COMPUTERNAME
37.     )
38.  
39.  
40.     BEGIN {}
41.  
42.     PROCESS {
43.         Foreach ($Computer in $ComputerName) {
44.             Try {
45.                 $PendingReboot = $false
46.  
47.                 $HKLM = [UInt32] "0x80000002"
48.                 $WMI_Reg = [WMIClass] "\$Computer\root\default:StdRegProv"
49.  
50.                 if ($WMI_Reg) {
51.                     if (($WMI_Reg.EnumKey($HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\")).sNames -contains 'RebootPending') {$PendingReboot = $true}
52.                     if (($WMI_Reg.EnumKey($HKLM,"SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\")).sNames -contains 'RebootRequired') {$PendingReboot = $true}
53.  
54.                     #Checking for SCCM namespace
55.                     $SCCM_Namespace = Get-WmiObject -Namespace ROOT\CCM\ClientSDK -List -ComputerName $Computer -ErrorAction Ignore
56.                     if ($SCCM_Namespace) {
57.                         if (([WmiClass]"\$Computer\ROOT\CCM\ClientSDK:CCM_ClientUtilities").DetermineIfRebootPending().RebootPending -eq $true) {$PendingReboot = $true}
58.                     }
59.  
60.                     [PSCustomObject]@{
61.                         ComputerName  = $Computer.ToUpper()
62.                         PendingReboot = $PendingReboot
63.                     }
64.                 }
65.             } catch {
66.                 Write-Error $_.Exception.Message
67.  
68.             } finally {
69.                 #Clearing Variables
70.                 $null = $WMI_Reg
71.                 $null = $SCCM_Namespace
72.             }
73.         }
74.     }
75.  
76.     END {}
77. }