PowerShell 技能连载 - 寻找丢失的更新

PowerShell 可以使用 Windows Update 客户端相同逻辑查询缺少的更新：

$UpdateSession = New-Object -ComObject Microsoft.Update.Session
$UpdateSearcher = $UpdateSession.CreateupdateSearcher()
$Updates = @($UpdateSearcher.Search("IsHidden=0 and IsInstalled=0").Updates)
$Updates | Select-Object Title

下面是返回更新标题和知识库编号（如果可用）的更复杂的方法：

$UpdateSession = New-Object -ComObject Microsoft.Update.Session
$UpdateSearcher = $UpdateSession.CreateupdateSearcher()
$Updates = @($UpdateSearcher.Search("IsHidden=0 and IsInstalled=0").Updates)
$Updates |
ForEach-Object {
    $pattern = 'KB\d{6,9}'
    if ($_.Title -match $pattern)
    {
        $kb = $matches[0]
    }
    else
    {
        $kb = 'N/A'
    }
    [PSCustomObject]@{
        Title = $_.Title
        KB = $kb
    }
} | Out-GridView