This is a small script for keeping wsusscn2.cab up-to-date. Modify it appropriately for your needs (beware at the paths). One can schedule it as a specific task or add it in the gpedit.msc to run at startup/logon. 
 
C:\en_wumt\wsusscn2cab_downoad.ps1
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$datetime = Get-Date -f yyyy-MM-dd-HH-mm
$basename = "wsusscn2_"
$extension = ".cab"

##Remove archived wsusscn2.cab file
function RemoveArchive
{
    if (Test-Path C:\en_wumt\archive\wsusscn2*.cab)
    {
        Remove-Item -Path C:\en_wumt\archive\wsusscn2*.cab
        MoveExisting
    }
    else
    {
        MoveExisting
    }
}

##Move existing wsusscn2.cab file to Archive and rename it with the move date timestamp
function MoveExisting
{
    if (Test-Path C:\en_wumt\wsusscn2.cab)
    {
        Move-Item C:\en_wumt\wsusscn2.cab C:\en_wumt\archive\wsusscn2.cab
        Rename-Item -Path C:\en_wumt\archive\wsusscn2.cab -NewName ($basename+$datetime+$extension)
        DownloadNewCab
    }
    else
    {
        DownloadNewCab
    }
}

##Download the new wsusscn2.cab file
function DownloadNewCab
{
    $client = new-object System.Net.WebClient
    $client.DownloadFile("http://go.microsoft.com/fwlink/?LinkID=74689","C:\en_wumt\wsusscn2.cab")

    ##Validate that the file is there and write entries to the eventlog
if (Test-Path C:\en_wumt\wsusscn2.cab)
    {
        Write-EventLog -Logname "Windows PowerShell" -Source PowerShell -EventId 555 -EntryType Information -Message "wsusscn2.cab file successfully downloaded to C:\en_wumt"
        #Run_wumt
    }
    else
    {
        Write-EventLog -Logname "Windows PowerShell" -Source PowerShell -EventId 8082 -EntryType Error -Message "wsusscn2.cab file download failed"
    Exit
    }
}

##Internet connection testing 
Write-EventLog -Logname "Windows PowerShell" -Source PowerShell -EventId 1000 -EntryType Information -Message "wsusscn2.cab file download script executed"
if (Test-Connection www.google.com -Quiet)
{
    RemoveArchive
}
else
{
    Write-EventLog -Logname "Windows PowerShell" -Source PowerShell -EventId 1234 -EntryType Error -Message "Internet connection DOWN! wsusscn2.cab file download failed"
}
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