REstartMultiple

restart-computer (get-content c:\work\computers.txt)
Start-Sleep -Seconds 300
get-content c:\work\computers.txt | ForEach-Object
    {
    if(Test-Path "\\$($_)\`$ADMIN\win.ini")
        {
            Write-Output "$($_) Online"
        }
        else
        {
            Write-Output "$($_) Offline"
        }
    } |export-csv "C:\temp\results.csv"