I must add a note: prerequisite for MVC 3 is not directly bound to host OP. As all .NET product it only required certain version of .NET Framework, nothing more.
So, you merely infer the logical chain: (prerequisite for MVC 3 is .NET Framework v.4.0 or later) & (prerequisite for .NET Framework v.4.0 is XP SP3 or later, for other OS products see
http://msdn.microsoft.com/en-us/library/ee390831.aspx[
^]) => MVC 3 requires… right!
—SA