DistinguishedName

$GetName = (get-ItemProperty hklm:\SOFTWARE\Microsoft\MPSD\OSD).OSDComputerName

$Find = Get-ADComputer ($GetName).DistinguishedName

$Find

On line 2 above I've also tried  

$Find = Get-ADComputer $GetName.DistinguishedName

Both return all day and I only want the DistinguishedName