$ErrorActionPreference='SilentlyContinue'
"== PENDING REBOOT CHECKS (all should be False) =="
"CBS RebootPending:            $([bool](Test-Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\RebootPending'))"
"WindowsUpdate RebootRequired: $([bool](Test-Path 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update\RebootRequired'))"
$pfro = (Get-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager' -Name PendingFileRenameOperations -ErrorAction SilentlyContinue).PendingFileRenameOperations
"PendingFileRenameOperations:  $([bool]$pfro)"
$cn1=(Get-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\ComputerName\ActiveComputerName').ComputerName
$cn2=(Get-ItemProperty 'HKLM:\SYSTEM\CurrentControlSet\Control\ComputerName\ComputerName').ComputerName
"Rename pending:               $($cn1 -ne $cn2)   (active=$cn1 / configured=$cn2)"

"== ROLE / SERVICE STATE (is AD DS ready to promote?) =="
Get-WindowsFeature AD-Domain-Services,RSAT-ADDS,DNS,DHCP | Select-Object Name,InstallState | Format-Table -Auto | Out-String
Get-Service NTDS,DNS,DHCPServer,Netlogon,W32Time | Select-Object Name,Status,StartType | Format-Table -Auto | Out-String

"== EXISTING TARGET PATHS (for data pre-seed) =="
foreach($p in 'C:\Share','C:\Share\Quickbooks','C:\Share\Deployment'){ "$p exists: $(Test-Path $p)" }

"== DISK C: =="
Get-Volume -DriveLetter C | Select-Object @{n='FreeGB';e={[math]::Round($_.SizeRemaining/1GB,1)}},@{n='SizeGB';e={[math]::Round($_.Size/1GB,1)}} | Format-Table -Auto | Out-String

"== UPTIME / LAST BOOT =="
$os=Get-CimInstance Win32_OperatingSystem
"Last boot: $($os.LastBootUpTime)   Uptime days: $([math]::Round(((Get-Date)-$os.LastBootUpTime).TotalDays,1))"

"== PENDING WINDOWS UPDATES (a big backlog = reboot churn) =="
try { $s=(New-Object -ComObject Microsoft.Update.Session).CreateUpdateSearcher(); $r=$s.Search("IsInstalled=0 and IsHidden=0"); "Pending updates: $($r.Updates.Count)" } catch { "update query n/a: $_" }
"== DONE =="