you can run W10 inside a v-box \ hyper -V senario or [what i would do] replace the drive that came with the system with a new blank drive and install Windows 10 on that
i assume the real issue here is your laptop doesn't have a valid Windows 10 key since it never was designed to run it so if you don't have a spare key then buying another Windows 10 laptop or desktop may turn out to be better value than trying to gummy-rig this one... in any event Windows 10 ends in 3 more years and you don't have a choice after that