Get-LatestWMF5.ps1

#Requires -Version 3.0

Function Get-LatestWMF5 {
[CmdletBinding()]
Param(
    [parameter(Mandatory)]
    [system.string]$TargetFolder
)
Begin {
    $HT = @{
        ErrorAction = 'Stop' ;
        Verbose     = $false ;
    }
    try {
        $null = Get-Item $TargetFolder @HT
    } catch {
        Write-Warning -Message "The target folder specified as parameter does not exist"
        break
    }
}
Process {
    try {
        $p = Invoke-WebRequest -URI 'http://aka.ms/wmf5latest' -UseBasicParsing @HT
    } catch {
        Write-Warning -Message "Failed to get webpage http://aka.ms/wmf5latest because $($_.Exception.Message)"
    }
    if ($p) {
        try {
           $d = Invoke-WebRequest -Uri $($p.BaseResponse.ResponseUri.OriginalString -replace 'details\.aspx','confirmation.aspx') -UseBasicParsing @HT
        } catch {
            Write-Warning -Message "Failed to get the content from webpage: $($p.BaseResponse.ResponseUri) because $($_.Exception.Message)"
        }

        Switch ([environment]::Is64BitOperatingSystem) {
            $true  {$bitness = '-x64' ; break}
            $false {$bitness = '-x86' ; break}
        }

        Switch ([Version]$((Get-CimInstance Win32_OperatingSystem).Version)) {
            { $_ -gt [Version]'6.3' -and $_ -lt [Version]'6.4'} { $OS = 'WindowsBlue'; break }
            { $_ -gt [Version]'6.2' -and $_ -lt [Version]'6.3'} { $OS = 'Windows8'   ; break }
            { $_ -gt [Version]'6.1' -and $_ -lt [Version]'6.2'} { $OS = 'Windows6.1' ; break }

        }
        if (-not($OS))  { 
            Write-Warning -Message "Theres's something wrong with the version of your Operating System. Aborting"
            break
        }
        if ($d) {
            $u = ($d.Links | Where {
                $_.href -match ('{0}.*\{1}.msu'-f $OS,$bitness)
            }).href | Select -First 1

            Write-Verbose -Message "About to download the latest WMF 5 from $u"

            try {
                Invoke-WebRequest -Uri $u -UseBasicParsing @HT -OutFile (Join-Path -Path $TargetFolder -ChildPath $(([uri]$u).Segments[-1]))
                Write-Verbose -Message "Successfully downloaded the latest WMF 5 to $TargetFolder"
                Get-Item -Path (Join-Path -Path $TargetFolder -ChildPath $(([uri]$u).Segments[-1]))
            } catch {
                Write-Warning -Message "Failed to download $u because $($_.Exception.Message)"
            }
        }
    }
}
End {}
}