Imagine running the latest Windows on an old Pentium 4 era computer

Is it possible? - Yes

Would you want to do so? - Maybe not

It would eat up so much storage, RAM, and compute processes

Also a big re-engineering of the Windows will be required to run on the ancient hardware, not to mention most newer functions will not work as the hardware parts just didn’t exist

If you somehow manage to solve that enormous software compatibility problem, it’ll work

But it will also run at a crawl and make for a less ideal user experience, and battery life will take a big hit from all the processing

It doesn’t really makes sense to do it in the first place