Powershell query

Trying to run a script that will query a txt file before running the query and action against each.  I have one that does if i manually put the server name but i would like to just do a text file due to the amount of machines.

$ComputerName = @('server2012', 'vista64esxi', 'server2008')
foreach ($Computer in $ComputerName) {
    if ($Status = Get-Service -ComputerName $Computer -Name RemoteRegistry -EA SilentlyContinue |

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