Read the original post here.
System Center Configuration Manager 2007 SP2, R2 and R3 now supports the Windows 7 SP1 and Windows Server 2008 R2 SP1 operating systems for client installation. The Configuration Manager console and branch distribution point are supported on these platforms. Windows Server 2008 R2 SP1 is supported for all core and feature-specific site system roles.
The following software update is required to add Windows 7 SP1 and Windows Server 2008 R2 SP1 to the Supported Platforms list:
- KB 2489044 – Update for System Center Configuration Manager 2007 SP2 to add Windows Server 2008 R2 SP1 and Windows 7 SP1 clients as supported platforms
- KB 977203 – User state migration is unsuccessful on a SCCM 2007 SP1 client or on a SCCM 2007 SP2 client
Configuration Manager 2007 SP2, R2 and R3 supports WinPE 3.1
System Center Configuration Manager SP2, R2 and R3 now supports WinPE 3.1 as the boot image used with operating system deployment. WinPE 3.1 is shipped with Windows 7 SP1 as a Windows Automated Installation Kit (WAIK) supplement.
Steps to upgrade to WinPE 3.1 within the existing Configuration Manager Environment and known limitations with Win PE 3.1 can be found here