SCCM - Another imaging problem!

Here's a new one - luckily this one was easy to resolve.

SMS Site Component Manager detected that site system "<ComputerName>" is running the Microsoft Windows NT Server operating system version 5.2, which is not a supported operating system for this version of SMS

Here's a case where I was able to search on this and find a resolution fairly quickly.  What happened is someone installed or modified a Windows 2003 distribution and checked the box to "Enable multicast" - which isn't supported until Windows 2008. 

Once this was turned off, everything worked great.