Disable Windows scheduled defrag on all computers in a domain

Disable-ScheduledDefrag.ps1

$ErrorActionPreference = "Continue"
$computers = Get-ADComputer -Filter 'ObjectClass -eq "Computer"' | Select-Object -Expand DNSHostName

Function DisableDefrag 
{
    If ((Get-ScheduledTask -TaskName 'ScheduledDefrag').State -eq 'Ready') 
    {
        Disable-ScheduledTask -TaskName 'ScheduledDefrag' -TaskPath '\Microsoft\Windows\Defrag'
        Write-Output "$env:computername Scheduled defrag disabled"
    }
        Else 
        {
            Write-Output "$env:computername Scheduled defrag not enabled"
        }
}

Foreach ($Computer in $Computers)
{
    Write-Output "Processing $Computer"
    winrm id -r:$Server 2>$null | Out-Null
    if ($LastExitCode -eq 0) 
    {
        Invoke-Command -ComputerName $Computer -ScriptBlock ${function:DisableDefrag}
    }
        Else 
        {
            Write-Output "Computer $Computer not online"
        }
}