Yeah, true. Fortunately the MSDN subscriber downloads inventory is publicly browsable: http://msdn.microsoft.com/en-us/subscriptions/downloads/default.aspx htt

Yeah, true. Fortunately the MSDN subscriber downloads inventory is publicly browsable: http://msdn.microsoft.com/en-us/subscriptions/downloads/default.aspx http://msdn.microsoft.com/en-us/subscriptions/downloads/defa... From there we can see the download details for all "Windows 7 with Service Pack 1" ISO files (all Windows 7 editions, all processor architectures and all languages). From there we can for example see the following information for the English Professional x64 version: File Name: en_windows_7_professional_with_sp1_x64_dvd_621750.iso Date Published (UTC): 2/16/2011 8:49:08 AM Last Updated (UTC): 2/16/2011 8:49:08 AM SHA1: 5ED2584110E03F498DB4458BA9FAFD5A7EF602ED ISO/CRC: 74F3CB73 With this information, I can be confident in downloading an ISO from a peer-to-peer torrent. When the hash matches, I can be assured that the file is legit and not backdoored.