NOTE: In-place upgrade is not supported with this release, only a full install is supported. Also, this is not supported in production environments.
System Center 2012 Service Pack 1 was announced at TechEd North and CTP2 was made publicly available on Friday of that week. There are number of features that have been added to this release, mostly importantly support for the upcoming Windows 8. There are a few prerequisites that are required and you can download them from the following links:
System Center 2012 Service Pack 1 CTP2
Windows Assessment and Deployment Kit (ADK) for Windows ® 8 Release Preview
Once you have downloaded the Service Pack, you will also need to download the prerequisite files. This can be done when installing the service pack if your system is Internet connected. However, if you are working in an isolated lab environment you can download the prerequisite files ahead of time using the setupdl.exe (found in SMSSETUP\BIN\X64) from an Internet connected machine. Only 16 files (roughly 248 MB) are downloaded, as opposed to 406 files (roughly 395 MB) for RTM.
If you try installing the Service Pack before installing the Windows ADK, it will give you a Failed Status for the User State Migration Tool, Windows Deployment Tools and Windows Preinstallation Environment as seen below.
Check the ConfigMgr setup log (C:\ConfigMgrSetup.log) for line that says “Configuration Manager Setup – Primary site upgrade completed”. You can also verify in the console by looking at the site properties, the build number for SP1 CTP2 is 5.00.7743.0000.