Finds the Windows version including Edition, Version and OS Build numbers for local or remote computers

Get-WindowsVersion.ps1

[CmdletBinding()]

Param
(
    [Parameter(Mandatory=$false,
                ValueFromPipelineByPropertyName=$true,
                ValueFromPipeline=$true
                )]
    [string[]]$ComputerName = $env:COMPUTERNAME
)


Begin
{
    $Table = New-Object System.Data.DataTable
    $Table.Columns.AddRange(@("ComputerName","Windows Edition","Version","OS Build"))
}
Process
{
    Foreach ($Computer in $ComputerName)
    {
        $Code = {
            $ProductName = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name ProductName).ProductName
            Try
            {
                $Version = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name ReleaseID -ErrorAction Stop).ReleaseID
            }
            Catch
            {
                $Version = "N/A"
            }
            $CurrentBuild = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name CurrentBuild).CurrentBuild
            $UBR = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name UBR).UBR
            $OSVersion = $CurrentBuild + "." + $UBR

            $TempTable = New-Object System.Data.DataTable
            $TempTable.Columns.AddRange(@("ComputerName","Windows Edition","Version","OS Build"))
            [void]$TempTable.Rows.Add($env:COMPUTERNAME,$ProductName,$Version,$OSVersion)
        
            Return $TempTable
        }

        If ($Computer -eq $env:COMPUTERNAME)
        {
            $Result = Invoke-Command -ScriptBlock $Code
            [void]$Table.Rows.Add($Result.Computername,$Result.'Windows Edition',$Result.Version,$Result.'OS Build')
        }
        Else
        {
            Try
            {
                $Result = Invoke-Command -ComputerName $Computer -ScriptBlock $Code -ErrorAction Stop
                [void]$Table.Rows.Add($Result.Computername,$Result.'Windows Edition',$Result.Version,$Result.'OS Build')
            }
            Catch
            {
                $_
            }
        }

    }

}
End
{
    Return $Table
}

Update to get Windows Build Codenames

[CmdletBinding()]

Param
(
    [Parameter(Mandatory=$false,
                ValueFromPipelineByPropertyName=$true,
                ValueFromPipeline=$true
                )]
    [string[]]$ComputerName = $env:COMPUTERNAME
)


Begin
{
    $Table = New-Object System.Data.DataTable
    $Table.Columns.AddRange(@("ComputerName","Windows Edition","Version","OS Build","Codename"))
}
Process
{
    Foreach ($Computer in $ComputerName)
    {
        $Code = {
            $ProductName = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name ProductName).ProductName
            Try
            {
                $Version = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name ReleaseID -ErrorAction Stop).ReleaseID
            }
            Catch
            {
                $Version = "N/A"
            }
            $CurrentBuild = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name CurrentBuild).CurrentBuild
            switch ($CurrentBuild)
            { 
                10240 { $Codename = "1507" }
                10586 { $Codename = "1511" }
                14393 { $Codename = "1607" }
                15063 { $Codename = "1703" }
                16299 { $Codename = "1709" }
                17134 { $Codename = "1803" }
                17763 { $Codename = "1809" }
                18362 { $Codename = "1903" }
                18363 { $Codename = "19H2" }
                19041 { $Codename = "20H2" }
                19042 { $Codename = "20H2" }
                19043 { $Codename = "21H2" }
                19044 { $Codename = "22H2" }
            }
            $UBR = (Get-ItemProperty 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion' -Name UBR).UBR
            $OSVersion = $CurrentBuild + "." + $UBR

            $TempTable = New-Object System.Data.DataTable
            $TempTable.Columns.AddRange(@("ComputerName","Windows Edition","Version","OS Build","CodeName"))
            [void]$TempTable.Rows.Add($env:COMPUTERNAME,$ProductName,$Version,$OSVersion,$Codename)
        
            Return $TempTable
        }

        If ($Computer -eq $env:COMPUTERNAME)
        {
            $Result = Invoke-Command -ScriptBlock $Code
            [void]$Table.Rows.Add($Result.Computername,$Result.'Windows Edition',$Result.Version,$Result.'OS Build',$Result.'CodeName')
        }
        Else
        {
            Try
            {
                $Result = Invoke-Command -ComputerName $Computer -ScriptBlock $Code -ErrorAction Stop
                [void]$Table.Rows.Add($Result.Computername,$Result.'Windows Edition',$Result.Version,$Result.'OS Build',$Result.'CodeName')
            }
            Catch
            {
                $_
            }
        }

    }

}
End
{
    Return $Table
}

@ernewes those code names are only valid for Windows 10, or not?