[Kazun]

Use Invoke-WUInstall to invoke Windows Update install remotly. It Based on TaskScheduler because
CreateUpdateDownloader() and CreateUpdateInstaller() methods can't be called from a remote computer - E_ACCESSDENIED.

Код:

$Script = {ipmo PSWindowsUpdate; Get-WUInstall -AcceptAll -AutoReboot | Out-File C:\PSWindowsUpdate.log}
Invoke-WUInstall -ComputerName $server -Script $Script