Thank you for your post.
FileMaker Server is not certified to run under Windows Server 2008 R2 Datacenter. Please review the System Requirements at:
Have you tried installing FileMaker Server 14 under Windows Server 2008 R2 SP1 Standard Edition or Enterprise Edition? If so, do you still get the same error?
With that said, what version of .NET Runtime are you using? Make sure you are using .NET 4.5.
If you have any virus detection software installed, please disable it and try again.