Check for Lync and install if not present

$Arch = Get-WmiObject -Class Win32_Processor | Select AddressWidth
$32 = test-path "C:\Program Files\Microsoft Office\Office15\lync.exe"
$64 = test-path "C:\Program Files (x86)\Microsoft Office\Office15\lync.exe"
$Install = "\\afs01v\Software\Lync_2013\x86\setup.exe"


if (($Arch.AddressWidth -eq "32") -and ($32 -eq $true))
    {
        Write-Output "Lync 2013 is already installed, continuing logon. Please wait..."
    }
elseif (($Arch.AddressWidth -eq "64") -and ($64 -eq $true))
    {
        Write-Output "Lync 2013 is already installed, continuing logon. Please wait..."
    }
else
    {
        Write-Output "Lync 2013 is not installed, silently installing. Please wait..."
        & $Install
    }