.NET Framework 3.5 - Part 1: Where you can find it?

There is the logical place on the Microsoft site, but if you installed Visual Studio 2008, you already have it (including 2.0 and 3.0) in both 32- and 64-bit versions.

In VS 2005, this was under the Visual Studio folder in Program Files. With VS 2008, it moved to being part of the Windows SDK, so now you can find it in (assuming you installed to default locations—otherwise, modify as needed): C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages

BTW, one nice feature of using this version is that you already have all 60 MB downloaded. So when you launch it and it says you need to download a bunch of data—well, just give it a second, because it doesn’t.