By Nash Pherson -
Microsoft just released KB2910552 for System Center 2012 R2 Configuration Manager to address issues when starting a task sequence from within a Windows XP operating system:
You cannot deploy Windows 8.1 to a Windows XP-based computer after you upgrade to System Center 2012 R2 Configuration Manager
This problem was introduced when support was added for the version of bootsect.exe in ADK for Windows 8.1. When the task sequence is started from within Windows XP, the native version of bootsect is used, but it doesn’t support the switches used by the tasks sequence.
This thread had been following the issue since shortly after R2′s release and included a workaround to manually replace the version of bootsect being used by the task sequence:
Now that the hotfix is out, hopefully this will be an easier process for those working feverishly to eradicate Windows XP from their environments.
There is still no official word on the release date for Cumulative Update 1 for ConfigMgr 2012 R2, nor if this hotfix will be included in it. Cumulative Update 4 was release last week for those on Service Pack 1.
I hope that helps,