Version: 4.5 File Name: dotNetFx45_Full_setup.exe Date Published: 10/9/2012 File Size: 982 KB Supported Operating System： Windows 7 Service Pack 1, Windows Server 2008 R2 SP1, Windows Server 2008 Service Pack 2, Windows Vista Service Pack 2 Windows Vista SP2 (x86 and x64) Windows 7 SP1 (x86 and x64)