$Server = 'localhost'
$port = '8530'

Write-Progress -Activity 'Getting WSUS server' -PercentComplete 0
$WSUSserver = Get-WsusServer -Name $server -PortNumber $port

Write-Progress -Activity 'Getting unapproved updates, this may take a while...' -PercentComplete 10
$notapprovedupdates = Get-WsusUpdate -UpdateServer $WSUSserver -Approval Unapproved -Status InstalledOrNotApplicableOrNoStatus

write-progress -Activity 'Getting Approved updates, this may take a while...' -PercentComplete 20
$approvedupdates = Get-WsusUpdate -UpdateServer $WSUSserver -Approval AnyExceptDeclined -Status InstalledOrNotApplicableOrNoStatus

Write-Progress -Activity 'Retrieved update list' -PercentComplete 30

$previewupdatelist = $notapprovedupdates | ? {$_.Update.Title -like "*Preview of Monthly*" -or $_.Update.Title -like "*Preview of Quality*"}

#$approvedupdatelist = $approvedupdates | ? {$_.Update.Title -like "*Dynamic Cumulative*" -or ($_.Update.Title -like "*Cumulative Update for Windows*" -and $_.Update.IsSuperseded -eq $true)}

$approvedupdatelist = $approvedupdates | ? {$_.Update.Title -like "*Dynamic Cumulative*" -or $_.Update.Title -like "*Preview of Monthly*" -or $_.Update.Title -like "*Preview of Quality*"}

$oldarchupdatelist = $approvedupdates | ? {$_.Update.Title -like "*ARM64-based*" -or $_.Update.Title -like "*Itanium-based*"}

$cuupdatessuperseded = $approvedupdates | ? {($_.Update.IsSuperseded -eq $true -and $_.Update.Title -like "*Microsoft SharePoint*") -or ($_.Update.IsSuperseded -eq $true -and $_.Update.Title -like "*Microsoft Web Apps Server*")}

Write-Progress -Activity 'Sorted update list' -PercentComplete 35

$total = $previewupdatelist.count + $approvedupdatelist.count + $oldarchupdatelist.count + $cuupdatessuperseded.count

$i = 0
foreach ($update in $previewupdatelist)
{
    Write-Progress -Activity 'Declining updates' -Status "$($update.Update.Title)" -PercentComplete (($i/$total) * 100)
    $update.Update.Decline()
    $i++
}

foreach ($update in $approvedupdatelist)
{
    Write-Progress -Activity 'Declining updates' -Status "$($update.Update.Title)" -PercentComplete (($i/$total) * 100)
    $update.Update.Decline()
    $i++
}

foreach ($update in $cuupdatessuperseded)
{
    Write-Progress -Activity 'Declining updates' -Status "$($update.Update.Title)" -PercentComplete (($i/$total) * 100)
    $update.Update.Decline()
    $i++
}


foreach ($update in $oldarchupdatelist)
{
    Write-Progress -Activity 'Declining updates' -Status "$($update.Update.Title)" -PercentComplete (($i/$total) * 100)
    $update.Update.Decline()
    $i++
}

Write-Host "Total declined preview updates: $($previewupdatelist.count)" -ForegroundColor Yellow
Write-Host "Total declined dynamic and cumulative updates: $($approvedupdatelist.count)" -ForegroundColor Yellow
Write-Host "Total declined updates: $total" -ForegroundColor Yellow