function Run-RemoteCMD {

    param(
    [Parameter(Mandatory=$true,valuefrompipeline=$true)]
    [string]$compname)
    begin {
        $command = Read-Host " Enter command to run"
        [string]$cmd = "CMD.EXE /C " +$command
                        }
    process {
        $newproc = Invoke-WmiMethod -class Win32_process -name Create -ArgumentList ($cmd) -ComputerName $compname
        if ($newproc.ReturnValue -eq 0 )
                { Write-Output " Command $($command) invoked Sucessfully on $($compname)" }
    }
    End{Write-Output "Script ...END"}
                 }


Run-RemoteCMD