Microsoft .NET Framework 3.5 Service Pack 1, Visual Studio 2008 Service Pack 1, and Team Foundation Server 2008 Service Pack 1 have been released. This is a big release on the heals of SQL Server 2008 which has a dependency on .and includes NET Framework 3.5 SP1.

This is a big release with many new features and improvements over previous releases. The service pack package itself has undergone a number of significant changes including a web bootstrap that downloads only the updates you need on your system and splits up larger patch packages into smaller packages that install together in a single transaction. For example, the default installation installs only VC libraries and tools for x86 so the patches which contain x64 and IA64 libraries and tools are not downloaded and applied. If you later install those features, re-run SP1 to update them.

There are a lot of updates and new packages. There are 5 update executables (.exe files), 4 installer packages (.msi files), and 13 patch packages (.msp files) per supported language. The executables actually contain a mix of installer and patch packages, including the .NET Framework 3.5 SP1.

If you’re having problems installing NetFX 3.5 SP1, VS 2008 SP1, or TFS 2008 SP1 please be sure to run the log collection utility available for download. If you’re installing VS2008 SP1 you will find an HTML log file in your %TEMP% directory with a name matching the pattern Microsoft Visual Studio 2008 SP1_*.html. When you open this file, the error will be displayed. With Internet Explorer you may need to first click the action bar that reads, “To help protect your security, Internet Explorer has restricted this webpage from running scripts or ActiveX control that could access your computer. Click here for options…”. There is a lot of rich information in this log, and it links to other files containing more detail that have the same file name with the .txt extension.

Please watch here for more news about and support of SP1.