My laptop has windows 8.1 and I want to use lightroom classic. I download lighroom classic and I have an answer that my computer doesn't support the software. I have to have windows 10 Is it possible to have an lightroom older version for my window's laptop?
Adobe can better deploy their development resources than supporting an obsolete and insecure OS.
To be fair to you, perhaps you bought one of the laptops with non-standard hardware that can't be upgraded to windows 10; my daughter-in-law had one of them. If so, it might also be too slow for Lightroom.
If a new machine is not within your current budget, in the interim you can use the free photo application included with Windows. Just choose a good file structure for organizing your photos and then experiment with it. While not Lightroom it is reasonably competent and supports most raw formats. It's a little clumsy at first but doesn't take long to learn.
If you must have Lightroom then you can buy an older version on eBay, I sold my old ones there.