HI, Is .Net Framework 3.5.1 which is in windows 7 features, is actually 3.5 with sp1? and another question - are you familiar with "Windows Presentation Foundation" plug-in? i am having some problem with it on windows 7 and i thought maybe it's got to do withe the .Net Framework version... Thanks

Hi, I would like to explain that the .Net Framework 3.5.1 is Microsoft .NET Framework 3.5 Service Pack 1. Regarding the Windows Presentation Foundation, you can refer to this article: Windows Presentation Foundation http://msdn.microsoft.com/en-us/library/ms754130.aspx Hope this helps. Vincent Wang TechNet Community Support