What is Significance of MSR, SYS, EFI partitions for Win 8.1 Native Boot VHD? How? I ask because I've built and native booted several variations of Win 8.1 VHDs on target SPro 3. I'd like to know pros & cons. CONTEXT: So, with a lot of help and input from multiple amazing people from multiple forums and coming closer to the goal of my project. I have found and tested the ways and means to complete the steps in my project. Some interesting questions and thoughts have come up. (http://forums.mydigitallife.info/threads/62362-Virtualize-Win8-1-BIOS-MBR-Physical-Partition-gt-to-gt-WIM-Imag