cls$featureID = (Get-SPFeature | ?{ ($_.DisplayName -eq "SiteNotebook") -and ( $_.Scope -eq "Web")}).id$sites = Get-SPSite foreach($Site in $sites){    $webs = $Site.AllWebs    foreach($Web in $webs)    {        Write-Host $Web.Url        Disable-SPFeature -Identity $featureID -Url $Web.Url -Confirm:$false    }}