Boot from VHD (Disclaimer)

I get a lot of questions on Booting from VHD to older (read: other that Windows 7 and Windows Server 2008 R2) Operating systems. for those people: mind this: be aware that this feature needs both support from your boot mechanism, AND the OS you are booting… This means, if it was not supported in the OS you are trying to boot, it will not work when using the bootmanager from Windows 7. The bootmanager only opens up the VHD file and points to the file necessary to proceed booting. If that file does not have knowledge on how to handle VHD files natively, it will fail.