$Session = New-Object -ComObject Microsoft.Update.Session
$Searcher = $Session.CreateUpdateSearcher()
$Searcher.Search("IsInstalled=1").Updates | sort LastDeploymentChangeTime | ft -a LastDeploymentChangeTime, title

$Session = New-Object -ComObject Microsoft.Update.Session
$Searcher = $Session.CreateUpdateSearcher()
$Searcher.Search("IsInstalled=1").Updates | sort LastDeploymentChangeTime | ft -a LastDeploymentChangeTime, title

From Powershell:
(New-Object -ComObject Microsoft.Update.AutoUpdate).DetectNow()