I have a PC running Windows 10 pro, 64 bit, installed in EFI mode on a GPT partitioned HDD. I want to install Windows 7, 32 bit, to a virtual hard drive (.vhd) in dual boot configuration. I have created the vhd and copied the required files to it (DISM...install.wim, etc.). However, I am unable to add the boot entry for the new OS. I keep getting the message that this version of bcdboot (from Windows 7) is incompatible with the current system, and that the required files could not be copied. Is what I want to do possible? Waiting to hear from you guys before I clean the HDD and repartition it as MBR. Also, I think I should install Windows 7 first and then install Windows 10. BIOS mode instead of EFI?