PowerShell: Function to test for pending reboot reason

PhlipElder

function Test-PendingReboot
{
 if (Get-ChildItem "HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootPending" -EA Ignore) { 
 $reboot = 'Component Based Servicing\RebootPending'
 Write-Host $reboot  }
 if (Get-Item "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired" -EA Ignore) { 
 $reboot = 'WindowsUpdate\Auto Update\RebootRequired' 
 Write-Host $reboot }
 if (Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Name PendingFileRenameOperations -EA Ignore) { 
   $reboot = 'CurrentControlSet\Control\Session Manager' 
   Write-Host $reboot}
 try { 
   $util = [wmiclass]"\\.\root\ccm\clientsdk:CCM_ClientUtilities"
   $status = $util.DetermineIfRebootPending()
   if(($status -ne $null) -and $status.RebootPending){
     $reboot = 'Configuration Manager'
     $reboot
   }
 }catch{}
 
 $reboot = 'no reboot required'
 Write-Host $reboot
}

Test-PendingReboot

Obsolesce

This reminded me of a tweet I seennot so long ago:
https://twitter.com/MarkWilkinsonNZ/status/1155931194925522944?s=19

It leads to here: https://adamtheautomator.com/pending-reboot-registry-windows/