Hi All,
My grandfather recently got a new desktop that is installed with windows 10 (which he likes) to replace his windows 7 computer from 2008. He has had conflicting help from several people in regard to transfering data (because he knows all the folder names, programs, etc in his old computer). Rather than transfer data, I simply added his old hard drive to his new computer (so the new computer now has 2 HDD's). Now, he can access all of his old files from file explorer> my computer>OS:F.
However, I (and He) would like to dual boot his new computer with both windows 10 (which is installed on the new hard drive) and windows 7 (which is installed on the older hard drive, which is now in the same computer). I attempted to use EasyBCD, but his new computer's windows 10 installation was running in UEFI mode, which caused several problems when attempting to dual boot windows 7 (installed under legacy mode). How should/can I fix this so that I can use a bootloader to let him pick between windows 7 and windows 10? (The ones he already has installed with programs and files).
NOTES:
-These are not custom built machines, both are Dell Studio XPS with proprietary hardware/drivers (for the most part). One from 2008 with a 1st gen i7, the other from 2016 with a 6th gen-skylake i7.
-The reason for dual booting is because he adores windows 7, but likes windows 10 and is slowly becoming more familiar with it. He often needs to go back to 7 for certain tasks.
-He is NOT computer literate in any way.
-Switching the bios from UEFI to Legacy allows me to boot into windows 7, but I can't boot into windows 10 (Changing the boot order yields the error "No OS Detected").
-Currently, the only way I can switch back and forth between 10 and 7 (that I know of) is to switch the BIOS back and forth between legacy and UEFI.
Thanks in advance!