.NET Framework 3.5 SP1

[Pagonis]

I can't install .NET Framework 3.5 SP1 because of this:

[10/09/08,17:24:17] Microsoft .NET Framework 2.0SP1 (CBS): [2] Error: Installation failed for component Microsoft .NET Framework 2.0SP1 (CBS). MSI returned error code 1060
[10/09/08,17:24:18] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0SP1 (CBS) is not installed.

But when I downloaded and tried installing .NET Framework 2.0SP1 I've got this error:

This product is not supported on Vista Operating System.

What should I do?

 

[Flavius]

Maybe this help you:
Aaron Ruckman's Web Log : When installing .NET Framework 3.5 on Vista what does the .NET Framework 2.0 SP1 on Vista error code 1058 mean and how do I work around it?

Check do you have:
Cryptographic Services is turned on
Windows Update is turned on

 

[Cantide]

I looked around and it turns out that if you do not have the Windows Live update service turned on, you cannot install the framework. I turned mine on and it worked right away.