I’m running an old windows and it warns me regularly that it doesn’t support this or that, such as Edge. But the things I use run fine.
I back up regularly to a thumb drive.
Here at work they replace our desktop and laptop computers when the manufacturer’s warranty runs out.
They’ve switched most of us to laptops so we can work at home some of the time.
One of these days I’ll go to a computer specialty store and get hardware and software modernized.
In my shop I use my rock solid XP machines to run two CNC machines and another that runs a CMM. The old engineering software on them still works fine and every once in a while I still use them for that. Of course I don’t use them on the web so not much of a problem with viruses and upgrades. I despise the new windows and their forced background updates that have wasted countless hours and cost me thousands of dollars.
if it’s not getting security updates I wouldn’t connect it to the internet.