Ok, don't sweat this tonight ... enjoy making your sister's birthday card.
I still have to find the correct value for the partition id - easy - just have to look it up.
Knowing it was Win8 is a good thing - you could if you wanted to go back, download hte ISO. But knowing you're good with Win10 - makes it even easier. You can download the ISO for Win10 as well. Win7 would have been an issue ... but that's no germane - cool.
Also knowing that you can access the D: partition - might make it easier.
I think we'll just nuke D: after two last checks:
1) Command Prompt (Admin)
enter the following commands
dir d:\ /a /s > %TEMP%\listDrvD.txt
Post a screen shot of Cmd window and close it
On your next post, attach (See: Upload Screenshots or Files)
Just paste the entire line above in the File name: field.
reagentc tells you where the Window Recovery is located - it's a bit cryptic, but figuring it out comes from a lot of the disk information you posted before.
dir lists the contents of D and > directs it into the file.
After I look at those two things, I think I'll just give you instructions to remove the OEM Recovery.
If you have any questions or objections - now is the time.
Well, I still have to write them up and you still have to read and execute them, so there's plenty of time