Get-ComputerModel.ps1

#Requires -RunAsAdministrator
$ComputerName = Read-Host -Prompt "Enter the computername"
$Model = Read-Host -Prompt "Enter the computermodel"
$query = "Select Model FROM Win32_ComputerSystem"
Get-WmiObject -Namespace "root\cimv2" -ComputerName $ComputerName -Query $query
If (-Not $Model -eq  ""){
    $query = "Select * FROM Win32_ComputerSystem WHERE Model LIKE '%$Model%'"
    Get-WmiObject -Namespace "root\cimv2" -ComputerName $ComputerName -Query $query
}