Server Pending Reboot - windows

Question

I am trying to modify my PowerShell script to find the best possible ways to check for Pending Reboots on our servers. This script checks the registry entries. However, I am seeing inconsistencies from other PowerShell scripts and wanting guidance on the best approach.
function PendingReboot ($comp) {
process {
try {
$WMI_OS = ""
$RegCon = ""
$WMI_OS = Get-WmiObject -Class Win32_OperatingSystem -ComputerName $comp -ErrorAction Stop
if ($?){
try{
$RegCon = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey([Microsoft.Win32.RegistryHive]"LocalMachine",$comp)
If ($WMI_OS.BuildNumber -ge 6001){
$RegValueSetupex = ""
$RegValuePFRO2k8 = ""
$RegSubKeySM = $RegCon.OpenSubKey("SYSTEM\CurrentControlSet\Control\Session Manager\")
$RegValueSetupex = $RegSubKeySM.GetValue("SetupExecute",$null)
if ($RegValueSetupex){
$RegValueSetupex = $true
}
$RegSubKeySM = $RegCon.OpenSubKey("SYSTEM\CurrentControlSet\Control\Session Manager\")
$RegValuePFRO2k8 = $RegSubKeySM.GetValue("PendingFileRenameOperations",$null)
if ($RegValuePFRO2k8 ){
$RegValuePFRO2k8 = $true
}
$RegCon.Close()
if ( $RegValueSetupex -eq $true -or $RegValuePFRO2k8 -eq $true){
return '<font color="#FF0000">'+$true
}
else {
return $false
}
}
else{
$RegValuePFRO2k3 = $false;
$RegCon = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey([Microsoft.Win32.RegistryHive]"LocalMachine","$comp")
$RegSubKeySM = $RegCon.OpenSubKey("SYSTEM\CurrentControlSet\Control\Session Manager\")
$RegValuePFRO2k3 = $RegSubKeySM.GetValue("PendingFileRenameOperations",$null)
$RegCon.Close()
If ($RegValuePFRO2k3) {
return '<font color="#FF0000">'+$true;
}
else {
return $false;
}
}
}
catch {
return '<font color="#FFFF00">'+"Remote Registry Service KO"
}
}
else {
throw $error[0].Exception
}
}
catch {
return '<font color="#FF0000">'+"RPC Issue"
}
}
}

Answer 1

Try this.
function PendingBoot($comp) {
$pendingRebootTests = #(
#{
Name = 'RebootPending'
Test = { Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing' Name 'RebootPending' -ErrorAction Ignore }
TestType = 'ValueExists'
}
#{
Name = 'RebootRequired'
Test = { Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update' Name 'RebootRequired' -ErrorAction Ignore }
TestType = 'ValueExists'
}
#{
Name = 'PendingFileRenameOperations'
Test = { Get-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager' -Name 'PendingFileRenameOperations' -ErrorAction Ignore }
TestType = 'NonNullValue'
}
)
$session = New-PSSession -Computer SRV1
foreach ($test in $pendingRebootTests) {
$result = Invoke-Command -Session $session -ScriptBlock $test.Test
if ($test.TestType -eq 'ValueExists' -and $result) {
$true
} elseif ($test.TestType -eq 'NonNullValue' -and $result -and $result.($test.Name)) {
$true
} else {
$false
}
}
$session | Remove-PSSession
}