Yes, you just use the Win10 media installer (free download from MS) and buy a win10 key off Amazon or wherever.
Or don't. I ran Windows 10 with the upgrade nag message for 9 years.
Are win10 keys on Amazon legitimate, and how would I tell?
You could also buy a Win11 key directly from MS which will activate a Win10 installation if you're worried about legitimacy.
Ah, as long as Win11 keys can activate Win10, that works.
I'm curious why, in 2024, anyone would want to buy a legit copy of Windows 10. Nearly every device comes with 10/11 preinstalled, and if for some reason it doesn't there are ways around that :)