如何使用powershell脚本检查上次windows更新已安装多长时间？

$lastUpdate = Get-WmiObject -Query "SELECT * FROM Win32_OperatingSystem" | Select-Object -ExpandProperty LastBootUpTime
$lastUpdate = $lastUpdate.Substring(0, 14) + ":" + $lastUpdate.Substring(14, 2)
$lastUpdate = [Management.ManagementDateTimeConverter]::ToDateTime($lastUpdate)
$daysSinceLastUpdate = (Get-Date) - $lastUpdate

Write-Host "上次Windows更新的安装时间：" $lastUpdate

Write-Host "距离上次Windows更新已经安装了：" $daysSinceLastUpdate.Days "天"