[@HarFanG] Here is the link:
How to Check if Windows is Booted in UEFI or Legacy BIOS Mode?
Well, as I previously said, that file does NOT exist in my 7.
Anyway, I found another way to check it => no luck, I’m using legacy.
So, this run us to the next question : how can I change from legacy to uefi mode ?
I bet it’s not possible until I do a fresh install of 7. That I don’t wanna do.