Cool, at least I got something right seeing it was last last night and my brain was fried. I might suggest putting a asterisk in the tutorial about the line no longer being needed since that line is also stressed in the video(s). That's what had me confused.
Thanks for the tutorial and the answer, I am sure this will work better than hacking the registry or another suggestion I found which was;
The part I didn't understand about the mlink was which drive would actually contain the files (use up harddrive space) and the place I found it didn't seem active.
mklink /J C:\Users\UserName D:\Users\UserName
I am looking forward to exploring more of this site and it's all because of your great, thoughtful and detailed tutorial. My system is a dual boot with Linux Debian and Win10 and I bet somewhere on this site explains how I get the windows boot loader back instead of the boring Grub bootloader from Linux. I did it before I think with a series of bcedit commands but for the life of me can't remember how...