Get Remote Machine Name and SerialNumber

Question

Hi -
Looking to get remote machines name and serial number using computer names in a text file. THis is what I have but it's not working. ANy suggestions? TIA
$computers = Get-Content c:\GETSN\computerlist.txt
$computers | foreach { Get-WmiObject -ComputerName computers -Class Win32_BIOS | Select -Property PSComputerName,SerialNumber}

Answer 1

Are you sure that all of the machines are online and you can run remote WMI queries against them?
This should try to take some of that error handling into account:
Get-Content .\computerList.txt | ForEach {
$props = @{
ComputerName = $_
SerialNumber = ''
Status = 'OFFLINE'
If (Test-Connection -ComputerName $_ -Count 1 -Quiet) {
$props.Status = 'Online'
try {
$bios = Get-WmiObject Win32_BIOS -ComputerName $_ -ErrorAction Stop
$props.SerialNumber = $bios.SerialNumber
} catch {
$props.SerialNumber = 'ERROR retrieving value'
New-Object PsObject -Property $props
} | Select ComputerName,SerialNumber,Status | Sort ComputerName
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