.NET Framework 3.5 Service Pack 1 - installation order
- System Update Readiness Tool
- .NET Framework 3.0 (Windows Server 2008 feature)
- .NET Framework 3.5 SP1 (full package)
- An update for the .NET Framework 3.5 Service Pack 1 is available (KB959209)
.NET Framework 3.5 Service Pack 1 - links
- Before you install .NET Framework 3.5 SP1 on Windows Vista or Windows 2008 Server, make sure that Windows Update service is turned on.
- Description of the System Update Readiness Tool for Windows Vista and for Windows Server 2008 - Since the .NET Framework 2.0 and 3.0 are OS components on Windows Vista and Windows Server 2008, they rely on the OS component store to be in a good state to be able to install correctly (quoted from here)
- Unified .NET Framework Troubleshooting Guide