Get-LatestHotfix.ps1

$TargetComputers = Import-Csv c:\ADcomputers.csv | Select-Object -ExpandProperty Name
ForEach($Target in $TargetComputers){
  If (Test-Connection -ComputerName $Target -Count 1){
    Get-Hotfix -ComputerName $Target | 
      Sort-Object -Property InstalledOn -Descending |
        Select-Object -First 1 -Property InstalledOn,PSComputerName |
          Export-Csv -Path C:\patchstatus.csv -Append
  } Else {
    Write-Error "Unable to connect to $Target"
  }
}