I lost our install cd's for sbs 2011 essentials in a move. Microsoft cant provide me with a copy and the vendor won't either since it's now unsupported. I found a copy and downloaded it from a torrent site. It says its legit and original (no cracks) I download Igorware to check the hash but I have no hash or verification file to check it against. How would I verify thats its matches the OEM hash?