Hi Saucy,
Thank you for posting here.
The .NET Framework 3.0 is included as part of the Windows Vista RTM
operating system and .NET Framework 3.5 is included in Windows 7. Regarding
the Windows Vista SP2, it includes many fixes for .NET Framework.
For more information, you can refer to HotFix List for Windows Server 2008
SP2 and Windows Vista SP2 (Microsoft Excel spreadsheet).
http://go.microsoft.com/fwlink/?LinkId=143706
If you have any questions or concerns, please feel free to let me know. I
am happy to be of further assistance.
Thanks!
Best regards,
Robinson Zhang
Microsoft Online Support