WSUS 3.0 SP1 will be available on Windows Update within the next few weeks. The package behavior is:
- Upgrade all previous versions of WSUS starting with WSUS 2.0 to WSUS 3.0 RTM running on Windows 2003 SP1+
- All upgrades will require user interaction.
- This service pack package will supersede WSUS 3.0 RTM packages.
- Block upgrades of all WSUS installation using remote SQL. This is now a manual upgrade process.
- Do not support upgrading previous versions of WSUS running on Windows 2008.
- System Center Essentials 1.0 RTM will not be upgraded to WSUS 3.0 SP1. This will be handled by a future release of System Center Essentials.
Note: “WSUS 2.0 SP1” and “WSUS 2.0 Client SelfUpdate Update for WSUS 2.0 SP1” packages will be expired. These updates are still available on the Download Center.
Source:→ WSUS Product Team Blog
WSUS, Service Pack, SP1, Windows Update