Microsoft has just updated the following KB Article:
You cannot stage a Windows PE 3.1 boot image to a Windows XP-based computer in System Center 2012 R2 Configuration Manager
Symptoms:
Assume that you install or upgrade to Microsoft System Center 2012 R2 Configuration Manager on a System Center Configuration Manager site server. When you try to deploy a task sequence that has an associated Windows PE 3.1 boot image to a Windows XP-based computer in an update scenario, the deployment fails, and the following error message is logged in the Smsts.log file:
Installing boot image to hard drive TSManager datetime 3048 (0x0BE8) Backing up existing boot system before trying to set up new boot system TSManager datetime 3048 (0x0BE8) BootLoader::backup: C:\, C:\_SMSTaskSequence\backup TSManager datetime 3048 (0x0BE8) BootLoader::restore: C:\_SMSTaskSequence\WinPE, C:\ TSManager datetime 3048 (0x0BE8) Saving bcd store to C:\_SMSTaskSequence\WinPE\boot\BCD TSManager datetime 3048 (0x0BE8) Executing command line: “C:\_SMSTaskSequence\WinPE\SMS\bin\i386\bootsect.exe” /NT60 SYS /MBR TSManagerdatetime 3048 (0x0BE8) CreateProcess failed. Code(0x800700C1) TSManager datetime 3048 (0x0BE8) Command line execution failed (800700C1) TSManager datetime 3048 (0x0BE8) Failed to install boot image. is not a valid Win32 application. (Error: 800700C1; Source: Windows) TSManager datetime 3048 (0x0BE8) Failed to install boot image CCR00004. is not a valid Win32 application. (Error: 800700C1; Source: Windows) TSManager datetime 3048 (0x0BE8) Failed to reboot the system. Error 0x(800700c1) TSManager datetime 3048 (0x0BE8) Failed to initialize a system reboot. is not a valid Win32 application. (Error: 800700C1; Source: Windows) TSManager datetime 3048 (0x0BE8) Fatal error is returned in check for reboot request of the action (Restart in Windows PE). is not a valid Win32 application. (Error: 800700C1; Source: Windows) TSManager datetime 3048 (0x0BE8)
Full details at:
http://support.microsoft.com/kb/2910552