or download this
----REG QUERY HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVer
+sion\Uninstall\{3C3901C5-3455-3E0A-A214-0B093A5070A6}----
...
Version REG_DWORD 0x400766f
Language REG_DWORD 0x0
DisplayName REG_SZ Microsoft .NET Framework 4 Client Profile