https://www.dotnetzone.gr:443/cs/blogs/birbilis/archive/2012/10/24/howto-check-msdn-subscriber-downloads-for-tampering-via-sha-1-key.aspxSupposing you have an MSDN Subscription, you could download say SQL Server 2012 Standard Edition (x86 and x64) – DVD (English) from the following URL: http://msdn.microsoft.com/en-us/subscriptions/downloads/hh442898.aspx#FileId=48810 Suppose youelCommunityServer 2.1 SP3 (Build: 20423.1)