I am using SCCM 2007 R3 with SP2 and MDT 2010
My task sequences were all working fine until one of the other SCCM admins "Synced all sites" by transferring the site settings of one site to all the other sites. How this broke OSD I don't know.
At this point the best I can tell is that the SCCM client is not being installed in the Task Sequence and so when it reboots to the installed OS there is no longer any communication and the task sequence fails with an error of "Windows could not configure one or more system components. To install Windows, restart the computer and then restart the installation.
I have run out of ideas to fix it so I am asking for the collective knowledge of the Interwebs for help.