put this on a laptop that had win 8.1 ....had no probs at all ......only thing needed sorting was drivers but all good now it looksNever done a Win10 upgrade of ANY type since it came out. lol, Im not sure if I can positively say it "will work" or wont, as far as upgrading OS. Try it in a VM and let me know. Im pretty sure it will upgrade Win7/8 with no issues, but when it comes to Win 10, the varieties abound..... and I dont have the knowledge to the results of upgrades
PS: last "upgrade" I did was Win 95 upgrade from Win 3.11. ALL other OS installs I've used since then have been "Wipe & Reload from scratch".
a bootable USB was made-Rufus- partition scheme:GPT; target system:UEFI(non CSM); file system: NTFS===no problems
EZ booting and installing, no glitches. you may want to tweak a bit further with Win10 bloater remover.
running good since last night. as usual, this build IS a KEEPER, again.
thanks, thanks and thanks. thought to share my 2cents. CHEERS !