PowerShell/Scripts/check-pending-reboot.ps1

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<#
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.SYNOPSIS
Check for pending reboots
.DESCRIPTION
This PowerShell script checks different registry keys and values to determine if a reboot is pending.
.EXAMPLE
./check-pending-reboot.ps1
.LINK
https://github.com/fleschutz/PowerShell
.NOTES
Author: Markus Fleschutz | License: CC0
#>
function Test-RegistryValue { param([parameter(Mandatory=$true)][ValidateNotNullOrEmpty()]$Path, [parameter(Mandatory=$true)] [ValidateNotNullOrEmpty()]$Value)
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try {
Get-ItemProperty -Path $Path -Name $Value -EA Stop
return $true
} catch {
return $false
}
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}
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$Reason = ""
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if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired") {
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$Reason += ", found registry entry: '...\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired'"
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}
if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\PostRebootReporting") {
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$Reason += ", found registry entry: '...\Windows\CurrentVersion\WindowsUpdate\Auto Update\PostRebootReporting'"
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}
if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootPending") {
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$Reason += ", found registry entry: '...\Windows\CurrentVersion\Component Based Servicing\RebootPending'"
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}
if (Test-Path -Path "HKLM:\SOFTWARE\Microsoft\ServerManager\CurrentRebootAttempts") {
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$Reason += ", found registry entry: '...\Microsoft\ServerManager\CurrentRebootAttempts'"
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}
if (Test-RegistryValue -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing" -Value "RebootInProgress") {
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$Reason += ", found registry entry: '...\Windows\CurrentVersion\Component Based Servicing' with 'RebootInProgress'"
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}
if (Test-RegistryValue -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Component Based Servicing" -Value "PackagesPending") {
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$Reason += ", found registry entry: '...\Windows\CurrentVersion\Component Based Servicing' with 'PackagesPending'"
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}
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#if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Value "PendingFileRenameOperations") {
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# $Reason += ", found registry entry '...\CurrentControlSet\Control\Session Manager' with 'PendingFileRenameOperations'"
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#}
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if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager" -Value "PendingFileRenameOperations2") {
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$Reason += ", found registry entry '...\CurrentControlSet\Control\Session Manager' with 'PendingFileRenameOperations2'"
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}
if (Test-RegistryValue -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce" -Value "DVDRebootSignal") {
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$Reason += ", found registry entry '...\Windows\CurrentVersion\RunOnce' with 'DVDRebootSignal'"
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}
if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon" -Value "JoinDomain") {
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$Reason += ", found registry entry '...\CurrentControlSet\Services\Netlogon' with 'JoinDomain'"
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}
if (Test-RegistryValue -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon" -Value "AvoidSpnSet") {
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$Reason += ", found registry entry '...\CurrentControlSet\Services\Netlogon' with 'AvoidSpnSet'"
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}
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if ($Reason -ne "") {
"⚠️ Pending reboot ($($Reason.substring(2)))."
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} else {
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"✅ No pending reboot."
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}
exit 0 # success