Hi alt100,
all it means is that GParted is missing certain files (dependencies or permission) needed to read NTFS partitions. If Win 10 was already activated on your PC, when you do a fresh install, click on "
I don't have a product key" and it will auto-activate after the new installation!.
Once installed, Win 10 is is signed with a digital licence, you won't need the key unless you change the motherboard!.